This document provides information about the basic elements of the human body, beginning with cells. It discusses cell structure, including the cell membrane, cytoplasm, and organelles. The cell membrane is composed of lipids, proteins, and carbohydrates. It is semipermeable and regulates what passes in and out of the cell. The cytoplasm contains organelles like the endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, and ribosomes. Each organelle has specific functions in the cell. The document also discusses the cytoskeleton and its role in maintaining cell shape and enabling cellular movement.
The document summarizes key components and functions of the cell membrane and cytoplasm. It describes the cell membrane as a selectively permeable phospholipid bilayer that envelops the cell. It also discusses the fluid mosaic model of the cell membrane and its integral and peripheral proteins. The cytoplasm is described as containing a cytosol and various organelles, including the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, and cytoskeleton. Various types of transport across the cell membrane, such as diffusion, osmosis, facilitated diffusion, and active transport, are also summarized.
The document discusses various types of transport through cell membranes. It begins by explaining the four main mechanisms of transport: diffusion, facilitated diffusion, osmosis, and active transport. Diffusion is described as the passive, random movement of molecules from an area of higher concentration to lower concentration down a concentration gradient. Facilitated diffusion utilizes membrane proteins to transport specific molecules. Osmosis involves the diffusion of water across the semi-permeable cell membrane. Active transport transports molecules against a concentration gradient by using energy in the form of ATP.
This document discusses cell membranes and transport mechanisms. It describes the four main mechanisms of transport through cell membranes: diffusion, facilitated diffusion, osmosis, and active transport. Diffusion is the passive movement of molecules or ions from an area of higher concentration to lower concentration down a concentration gradient. Facilitated diffusion utilizes membrane proteins to transport specific molecules. Osmosis is the passive movement of water across a membrane, moving from an area of lower solute concentration to higher. Active transport requires energy and transports molecules against a concentration gradient using membrane proteins like pumps and channels.
This document provides an overview of cell structure and function. It discusses the structure and functions of cellular organelles like the cell membrane, mitochondria, endoplasmic reticulum, lysosomes, peroxisomes, and cytoskeleton. It also describes intercellular junctions and cell adhesion molecules. A case study example is provided to illustrate glycogen storage disorder.
The document summarizes the structure of a cell. It discusses the key components of a cell including the cell membrane, cytoplasm, organelles like the nucleus, mitochondria, Golgi apparatus, endoplasmic reticulum, and cytoskeleton. The cell membrane forms the protective outer layer of the cell and is semi-permeable, regulating what passes in and out. The cytoplasm contains organelles suspended in cytosol. The nucleus houses genetic material and controls cell activities. Other organelles carry out important functions like energy production, protein transport, and maintaining cell shape.
Cells are the basic building blocks of the body and contain organelles that allow them to perform specialized functions. The major parts of the cell are the nucleus and cytoplasm. The cytoplasm contains organelles like the endoplasmic reticulum, Golgi apparatus, mitochondria, lysosomes, and peroxisomes that help transport molecules, synthesize proteins, produce energy, and digest waste. The cell is enclosed by a membrane that regulates what enters and exits using integral and peripheral proteins and transports molecules through channels and carrier proteins.
The cell membrane envelops the cell and is composed of a lipid bilayer with embedded and attached proteins and carbohydrates. It regulates what enters and exits the cell. The nucleus houses the genetic material and is separated from the cytoplasm by the nuclear membrane. Organelles such as the mitochondria and endoplasmic reticulum are enclosed by their own membranes and perform specialized functions to keep the cell functioning.
Cell structure slideshare.pptx Unlocking the Secrets of Cells: Structure, Fun...ananyagirishbabu1
Dive into the intricate world of cells with our detailed Slideshare presentation. This educational resource is designed to provide a thorough understanding of cells, the fundamental building blocks of all living organisms. Ideal for students, educators, and biology enthusiasts, this presentation covers:
Introduction to Cell Theory: Discover the historical development of cell theory and its significance in modern biology.
Types of Cells: Compare and contrast prokaryotic and eukaryotic cells, highlighting their unique features and functions.
Cell Organelles and Their Functions: Explore the various organelles within a cell, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and more, each described with their specific roles.
Cell Membrane Structure and Function: Learn about the composition and function of the cell membrane, including its role in regulating the movement of substances in and out of the cell.
Cell Division and Reproduction: Understand the processes of mitosis and meiosis, key to cellular replication and genetic diversity.
Specialized Cells: Investigate the diversity of cell types, including muscle cells, nerve cells, and blood cells, and their specialized functions in multicellular organisms.
Interactive Diagrams and Visual Aids: Engage with detailed diagrams and illustrations that clarify complex concepts and enhance learning.Introduction to Cell Theory: Discover the historical development of cell theory and its significance in modern biology.
Types of Cells: Compare and contrast prokaryotic and eukaryotic cells, highlighting their unique features and functions.
Cell Organelles and Their Functions: Explore the various organelles within a cell, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and more, each described with their specific roles.
Cell Membrane Structure and Function: Learn about the composition and function of the cell membrane, including its role in regulating the movement of substances in and out of the cell.
Cell Division and Reproduction: Understand the processes of mitosis and meiosis, key to cellular replication and genetic diversity.
Specialized Cells: Investigate the diversity of cell types, including muscle cells, nerve cells, and blood cells, and their specialized functions in multicellular organisms.
Interactive Diagrams and Visual Aids: Engage with detailed diagrams and illustrations that clarify complex concepts and enhance learning.
This Slideshare presentation is a valuable educational tool, offering clear explanations and engaging visuals to help you grasp the essential concepts of cellular biology. Whether preparing for exams, teaching a class, or simply exploring the microscopic foundations of life, this resource provides a comprehensive overview of the fascinating world of cells. Explore the fascinating world of cells with our comprehensive SlideShare presentation. This educational resource delves into the fundamental unit of life,
The document summarizes key components and functions of the cell membrane and cytoplasm. It describes the cell membrane as a selectively permeable phospholipid bilayer that envelops the cell. It also discusses the fluid mosaic model of the cell membrane and its integral and peripheral proteins. The cytoplasm is described as containing a cytosol and various organelles, including the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, and cytoskeleton. Various types of transport across the cell membrane, such as diffusion, osmosis, facilitated diffusion, and active transport, are also summarized.
The document discusses various types of transport through cell membranes. It begins by explaining the four main mechanisms of transport: diffusion, facilitated diffusion, osmosis, and active transport. Diffusion is described as the passive, random movement of molecules from an area of higher concentration to lower concentration down a concentration gradient. Facilitated diffusion utilizes membrane proteins to transport specific molecules. Osmosis involves the diffusion of water across the semi-permeable cell membrane. Active transport transports molecules against a concentration gradient by using energy in the form of ATP.
This document discusses cell membranes and transport mechanisms. It describes the four main mechanisms of transport through cell membranes: diffusion, facilitated diffusion, osmosis, and active transport. Diffusion is the passive movement of molecules or ions from an area of higher concentration to lower concentration down a concentration gradient. Facilitated diffusion utilizes membrane proteins to transport specific molecules. Osmosis is the passive movement of water across a membrane, moving from an area of lower solute concentration to higher. Active transport requires energy and transports molecules against a concentration gradient using membrane proteins like pumps and channels.
This document provides an overview of cell structure and function. It discusses the structure and functions of cellular organelles like the cell membrane, mitochondria, endoplasmic reticulum, lysosomes, peroxisomes, and cytoskeleton. It also describes intercellular junctions and cell adhesion molecules. A case study example is provided to illustrate glycogen storage disorder.
The document summarizes the structure of a cell. It discusses the key components of a cell including the cell membrane, cytoplasm, organelles like the nucleus, mitochondria, Golgi apparatus, endoplasmic reticulum, and cytoskeleton. The cell membrane forms the protective outer layer of the cell and is semi-permeable, regulating what passes in and out. The cytoplasm contains organelles suspended in cytosol. The nucleus houses genetic material and controls cell activities. Other organelles carry out important functions like energy production, protein transport, and maintaining cell shape.
Cells are the basic building blocks of the body and contain organelles that allow them to perform specialized functions. The major parts of the cell are the nucleus and cytoplasm. The cytoplasm contains organelles like the endoplasmic reticulum, Golgi apparatus, mitochondria, lysosomes, and peroxisomes that help transport molecules, synthesize proteins, produce energy, and digest waste. The cell is enclosed by a membrane that regulates what enters and exits using integral and peripheral proteins and transports molecules through channels and carrier proteins.
The cell membrane envelops the cell and is composed of a lipid bilayer with embedded and attached proteins and carbohydrates. It regulates what enters and exits the cell. The nucleus houses the genetic material and is separated from the cytoplasm by the nuclear membrane. Organelles such as the mitochondria and endoplasmic reticulum are enclosed by their own membranes and perform specialized functions to keep the cell functioning.
Cell structure slideshare.pptx Unlocking the Secrets of Cells: Structure, Fun...ananyagirishbabu1
Dive into the intricate world of cells with our detailed Slideshare presentation. This educational resource is designed to provide a thorough understanding of cells, the fundamental building blocks of all living organisms. Ideal for students, educators, and biology enthusiasts, this presentation covers:
Introduction to Cell Theory: Discover the historical development of cell theory and its significance in modern biology.
Types of Cells: Compare and contrast prokaryotic and eukaryotic cells, highlighting their unique features and functions.
Cell Organelles and Their Functions: Explore the various organelles within a cell, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and more, each described with their specific roles.
Cell Membrane Structure and Function: Learn about the composition and function of the cell membrane, including its role in regulating the movement of substances in and out of the cell.
Cell Division and Reproduction: Understand the processes of mitosis and meiosis, key to cellular replication and genetic diversity.
Specialized Cells: Investigate the diversity of cell types, including muscle cells, nerve cells, and blood cells, and their specialized functions in multicellular organisms.
Interactive Diagrams and Visual Aids: Engage with detailed diagrams and illustrations that clarify complex concepts and enhance learning.Introduction to Cell Theory: Discover the historical development of cell theory and its significance in modern biology.
Types of Cells: Compare and contrast prokaryotic and eukaryotic cells, highlighting their unique features and functions.
Cell Organelles and Their Functions: Explore the various organelles within a cell, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and more, each described with their specific roles.
Cell Membrane Structure and Function: Learn about the composition and function of the cell membrane, including its role in regulating the movement of substances in and out of the cell.
Cell Division and Reproduction: Understand the processes of mitosis and meiosis, key to cellular replication and genetic diversity.
Specialized Cells: Investigate the diversity of cell types, including muscle cells, nerve cells, and blood cells, and their specialized functions in multicellular organisms.
Interactive Diagrams and Visual Aids: Engage with detailed diagrams and illustrations that clarify complex concepts and enhance learning.
This Slideshare presentation is a valuable educational tool, offering clear explanations and engaging visuals to help you grasp the essential concepts of cellular biology. Whether preparing for exams, teaching a class, or simply exploring the microscopic foundations of life, this resource provides a comprehensive overview of the fascinating world of cells. Explore the fascinating world of cells with our comprehensive SlideShare presentation. This educational resource delves into the fundamental unit of life,
Cell membranes are composed of lipids (45%), proteins (45%), and carbohydrates (10%). Lipids form a bilayer with hydrophilic heads facing out and hydrophobic tails facing inward. Membrane proteins can be peripheral or integral. Peripheral proteins attach to lipid heads while integral proteins span or embed within the membrane. Together, lipids and proteins give cell membranes a fluid mosaic structure and allow them to perform important functions like selectively regulating transport into and out of the cell.
Cell membranes contain proteins that transport molecules across the membrane. Simple diffusion allows small, nonpolar molecules to pass through, while protein channels called ion channels rapidly transport ions down their concentration gradients. Carrier proteins also transport molecules via facilitated diffusion or active transport. Facilitated diffusion uses carrier proteins to transport molecules down their concentration gradients without direct input of energy. Active transport transports molecules against their gradients by carrier proteins that change conformation in an energy-requiring process.
This document provides an overview of cell physiology, including the structure and functions of cells, tissues, organs, and organ systems. It discusses that cells are the basic structural and functional units of living organisms. The key points are:
- Cells have a cell membrane that regulates what enters and exits, cytoplasm containing organelles, and a nucleus containing genetic material.
- Tissues are groups of cells with similar functions, like muscle, nervous, epithelial and connective tissues.
- Organs are structures composed of multiple tissue types performing specialized functions, like the brain, heart, lungs and liver.
- Organ systems are groups of organs working together, such as the digestive, excretory, cardiovascular and respiratory
This document provides information about the structure and functions of eukaryotic cells. It discusses the key organelles found in cells like the nucleus, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, and cytoskeleton. It explains their roles and comparative differences between prokaryotic and eukaryotic cells. Additionally, it covers the plasma membrane structure and fluid mosaic model. Finally, it summarizes different cell transport mechanisms including passive transport processes like diffusion, facilitated diffusion, and osmosis as well as active transport mechanisms like protein pumps, endocytosis, and exocytosis.
This document summarizes the structure and functions of the cell and its organelles. It begins by stating that all living things are composed of cells, and that cells are the basic structural and functional units of living bodies. It then describes the general characteristics of cells and the structures of the cell, including the cell membrane, cytoplasm, and nucleus. Specific organelles like the endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria and ribosomes are then explained in more detail. The functions of these various cell structures are also outlined.
This document discusses cell organelles and plasma membrane. It describes that cells contain various organized structures called organelles, which can be separated by disrupting the cell membrane and applying differential centrifugal forces. Some organelles contain marker enzymes that can identify them. The document then discusses the structure and functions of the nucleus, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, and plasma membrane. It explains that the plasma membrane regulates transport into and out of the cell using both passive and active transport mechanisms.
cell and cell organelles-Nursing. Day 2.pptxUsman Hashmi
The document discusses cell biology and cell organelles. It begins by defining cells and providing examples of different cell types. It then describes the key differences between prokaryotic and eukaryotic cells. The main organelles of eukaryotic cells are then outlined, including their structures and functions. These organelles include the nucleus, mitochondria, endoplasmic reticulum, Golgi complex, lysosomes, peroxisomes, and cytoskeleton. The roles of the cytosol and plasma membrane are also summarized. Finally, the document briefly discusses tissue regeneration and abnormalities in cell division like cancer.
1. The document describes the structure and functions of eukaryotic cells and their organelles. It discusses the cell membrane, cytoplasm, nucleus, and various organelles found within cells like the endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria, and ribosomes.
2. The cell membrane forms the protective outer layer of the cell and regulates what passes in and out through selective permeability. The cytoplasm contains organelles suspended in cytosol and encloses the cell's genetic material in the nucleus.
3. Organelles perform specialized functions like protein transport (ER and Golgi), waste disposal (lysosomes), energy production (mitochondria), and protein synthesis (ribosomes). Together
This document provides notes on human cell anatomy and physiology. It discusses the structure and functions of the cell membrane, cytoplasm, and organelles. The cell membrane is composed of lipids, proteins, and carbohydrates. It regulates what enters and exits the cell. The cytoplasm contains organelles like mitochondria, which produce energy, and the endoplasmic reticulum, involved in protein synthesis. The nucleus houses genetic material and the nucleolus. Other organelles discussed include the Golgi apparatus and lysosomes.
Cell Structures and Functions In pathology.pptxVictory120660
Cell structure and function are fundamental to understanding biology. Here's a broad overview:
1. **Cell Structure:**
- **Cell Membrane:** Acts as a barrier, controlling the passage of substances in and out of the cell.
- **Cytoplasm:** Gel-like substance within the cell where organelles are suspended.
- **Nucleus:** Contains genetic material (DNA) and controls cell activities.
- **Organelles:** Structures within the cell with specific functions, such as mitochondria (energy production), endoplasmic reticulum (protein synthesis), Golgi apparatus (protein packaging), and lysosomes (digestion).
2. **Cell Function:**
- **Metabolism:** Cells carry out metabolic processes to maintain life, including energy production, nutrient breakdown, and waste removal.
- **Reproduction:** Cells can reproduce through processes like mitosis (cell division) or meiosis (reproductive cell division).
- **Homeostasis:** Cells maintain a stable internal environment by regulating processes like temperature, pH, and nutrient levels.
- **Communication:** Cells communicate with each other through chemical signals, allowing coordination within tissues and organ systems.
- **Differentiation:** Cells specialize into different types with specific functions during development, forming tissues and organs.
- **Response to Stimuli:** Cells can respond to external stimuli, such as light or chemicals, through processes like movement or changes in gene expression.
Understanding cell structure and function is crucial for comprehending biological processes at all levels, from the functioning of individual organisms to the interactions within ecosystems.
Membrane structure and membrane chemistry.pptxrajashri101
The document discusses membrane structures, specifically plasma membranes. It begins by explaining that plasma membranes hold the cell together and act as a barrier, being composed of a phospholipid bilayer with embedded and peripheral proteins. It then provides details on the fluid mosaic model of membrane structure, which proposes that membranes are a fluid bilayer of lipids with globular proteins dispersed within. The functions of plasma membranes are then outlined, including compartmentalization, selectively permitting transport, responding to signals, and mediating cell-cell interactions through receptors.
The document provides information on the structure and functions of various cell organelles. It discusses the cell membrane, cytoplasm, and nucleus. Within the cytoplasm, it describes the organelles with limiting membranes like the endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, centrosomes, mitochondria and those without limiting membranes like ribosomes and cytoskeleton. Each organelle is described in terms of its structure, composition, location within the cell and specific functions. The document serves as a comprehensive guide to the essential components within the cell and their roles in maintaining cellular activities.
1. A cell is the basic structural and functional unit of living organisms, with over 200 cell types that vary in shape, size, and function.
2. The plasma membrane defines the boundary of the cell and is composed of a lipid bilayer with embedded and peripheral proteins. It regulates what enters and exits the cell.
3. The cytoplasm contains organelles like mitochondria, ribosomes, the endoplasmic reticulum, Golgi apparatus, and lysosomes that carry out specialized functions to keep the cell working properly.
The cell its organells and their functionsSumama Shakir
The document provides information on the structure and functions of eukaryotic cells and their organelles. It discusses the key differences between prokaryotic and eukaryotic cells, and describes the major organelles found in animal and plant cells - including the cell membrane, nucleus, cytoplasm, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, centrosomes, and ribosomes. Each organelle is described in terms of its location, structure, and specific functions within the cell.
The document discusses cell membranes. It describes how cell membranes are made up of lipids like phospholipids and cholesterol that form a bilayer. Proteins are also embedded throughout membranes and help regulate transport of molecules. The membrane acts as a selective barrier, controlling what enters and exits the cell using transport proteins. Membranes surround not just cells but also internal organelles, and their compositions vary by location to support different functions.
Cell Anatomy and physiology ( structure and function for NEET asparients, Biology, MBBS, BPT, Allied, nursing , medical and paramedical students. This is the easiest form of slide share to understand the context better.
The document summarizes key aspects of cell structure and function according to the cell theory. It describes the basic components of cells, including the plasma membrane, nucleus, cytoplasm, and various organelles. It explains that cells are the basic structural and functional units of living organisms, and that their biochemical activities depend on their specific subcellular structures. The key cellular processes of protein synthesis and transport are also summarized.
The document provides information about microscopic anatomy and the cell. It discusses the key differences between prokaryotic and eukaryotic cells, and describes the basic structures and organelles of a typical eukaryotic cell, including the cell membrane, nucleus, cytoplasm, mitochondria, endoplasmic reticulum, Golgi complex, lysosomes, peroxisomes, ribosomes, centrioles, and cytoskeleton. It also covers the functions of these cellular components and structures like the cell membrane, as well as cellular transport mechanisms and intercellular junctions.
Lecture 4 Membrane Structure and Membrane Transport of Small Molecules PT_7.pdfRajveerChoudhary28
The document discusses membrane structure and transport of small molecules across membranes. It begins by introducing the roles and components of cell membranes, including defining compartments and regulating transport. The membrane is composed of lipids like phospholipids and cholesterol, as well as integral and peripheral proteins. Transport across membranes can occur through passive or active methods. Passive transport includes simple diffusion of small soluble molecules and facilitated diffusion using channel or carrier proteins to transport molecules down their concentration gradients without energy.
Here is the updated list of Top Best Ayurvedic medicine for Gas and Indigestion and those are Gas-O-Go Syp for Dyspepsia | Lavizyme Syrup for Acidity | Yumzyme Hepatoprotective Capsules etc
Cell membranes are composed of lipids (45%), proteins (45%), and carbohydrates (10%). Lipids form a bilayer with hydrophilic heads facing out and hydrophobic tails facing inward. Membrane proteins can be peripheral or integral. Peripheral proteins attach to lipid heads while integral proteins span or embed within the membrane. Together, lipids and proteins give cell membranes a fluid mosaic structure and allow them to perform important functions like selectively regulating transport into and out of the cell.
Cell membranes contain proteins that transport molecules across the membrane. Simple diffusion allows small, nonpolar molecules to pass through, while protein channels called ion channels rapidly transport ions down their concentration gradients. Carrier proteins also transport molecules via facilitated diffusion or active transport. Facilitated diffusion uses carrier proteins to transport molecules down their concentration gradients without direct input of energy. Active transport transports molecules against their gradients by carrier proteins that change conformation in an energy-requiring process.
This document provides an overview of cell physiology, including the structure and functions of cells, tissues, organs, and organ systems. It discusses that cells are the basic structural and functional units of living organisms. The key points are:
- Cells have a cell membrane that regulates what enters and exits, cytoplasm containing organelles, and a nucleus containing genetic material.
- Tissues are groups of cells with similar functions, like muscle, nervous, epithelial and connective tissues.
- Organs are structures composed of multiple tissue types performing specialized functions, like the brain, heart, lungs and liver.
- Organ systems are groups of organs working together, such as the digestive, excretory, cardiovascular and respiratory
This document provides information about the structure and functions of eukaryotic cells. It discusses the key organelles found in cells like the nucleus, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, and cytoskeleton. It explains their roles and comparative differences between prokaryotic and eukaryotic cells. Additionally, it covers the plasma membrane structure and fluid mosaic model. Finally, it summarizes different cell transport mechanisms including passive transport processes like diffusion, facilitated diffusion, and osmosis as well as active transport mechanisms like protein pumps, endocytosis, and exocytosis.
This document summarizes the structure and functions of the cell and its organelles. It begins by stating that all living things are composed of cells, and that cells are the basic structural and functional units of living bodies. It then describes the general characteristics of cells and the structures of the cell, including the cell membrane, cytoplasm, and nucleus. Specific organelles like the endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria and ribosomes are then explained in more detail. The functions of these various cell structures are also outlined.
This document discusses cell organelles and plasma membrane. It describes that cells contain various organized structures called organelles, which can be separated by disrupting the cell membrane and applying differential centrifugal forces. Some organelles contain marker enzymes that can identify them. The document then discusses the structure and functions of the nucleus, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, and plasma membrane. It explains that the plasma membrane regulates transport into and out of the cell using both passive and active transport mechanisms.
cell and cell organelles-Nursing. Day 2.pptxUsman Hashmi
The document discusses cell biology and cell organelles. It begins by defining cells and providing examples of different cell types. It then describes the key differences between prokaryotic and eukaryotic cells. The main organelles of eukaryotic cells are then outlined, including their structures and functions. These organelles include the nucleus, mitochondria, endoplasmic reticulum, Golgi complex, lysosomes, peroxisomes, and cytoskeleton. The roles of the cytosol and plasma membrane are also summarized. Finally, the document briefly discusses tissue regeneration and abnormalities in cell division like cancer.
1. The document describes the structure and functions of eukaryotic cells and their organelles. It discusses the cell membrane, cytoplasm, nucleus, and various organelles found within cells like the endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria, and ribosomes.
2. The cell membrane forms the protective outer layer of the cell and regulates what passes in and out through selective permeability. The cytoplasm contains organelles suspended in cytosol and encloses the cell's genetic material in the nucleus.
3. Organelles perform specialized functions like protein transport (ER and Golgi), waste disposal (lysosomes), energy production (mitochondria), and protein synthesis (ribosomes). Together
This document provides notes on human cell anatomy and physiology. It discusses the structure and functions of the cell membrane, cytoplasm, and organelles. The cell membrane is composed of lipids, proteins, and carbohydrates. It regulates what enters and exits the cell. The cytoplasm contains organelles like mitochondria, which produce energy, and the endoplasmic reticulum, involved in protein synthesis. The nucleus houses genetic material and the nucleolus. Other organelles discussed include the Golgi apparatus and lysosomes.
Cell Structures and Functions In pathology.pptxVictory120660
Cell structure and function are fundamental to understanding biology. Here's a broad overview:
1. **Cell Structure:**
- **Cell Membrane:** Acts as a barrier, controlling the passage of substances in and out of the cell.
- **Cytoplasm:** Gel-like substance within the cell where organelles are suspended.
- **Nucleus:** Contains genetic material (DNA) and controls cell activities.
- **Organelles:** Structures within the cell with specific functions, such as mitochondria (energy production), endoplasmic reticulum (protein synthesis), Golgi apparatus (protein packaging), and lysosomes (digestion).
2. **Cell Function:**
- **Metabolism:** Cells carry out metabolic processes to maintain life, including energy production, nutrient breakdown, and waste removal.
- **Reproduction:** Cells can reproduce through processes like mitosis (cell division) or meiosis (reproductive cell division).
- **Homeostasis:** Cells maintain a stable internal environment by regulating processes like temperature, pH, and nutrient levels.
- **Communication:** Cells communicate with each other through chemical signals, allowing coordination within tissues and organ systems.
- **Differentiation:** Cells specialize into different types with specific functions during development, forming tissues and organs.
- **Response to Stimuli:** Cells can respond to external stimuli, such as light or chemicals, through processes like movement or changes in gene expression.
Understanding cell structure and function is crucial for comprehending biological processes at all levels, from the functioning of individual organisms to the interactions within ecosystems.
Membrane structure and membrane chemistry.pptxrajashri101
The document discusses membrane structures, specifically plasma membranes. It begins by explaining that plasma membranes hold the cell together and act as a barrier, being composed of a phospholipid bilayer with embedded and peripheral proteins. It then provides details on the fluid mosaic model of membrane structure, which proposes that membranes are a fluid bilayer of lipids with globular proteins dispersed within. The functions of plasma membranes are then outlined, including compartmentalization, selectively permitting transport, responding to signals, and mediating cell-cell interactions through receptors.
The document provides information on the structure and functions of various cell organelles. It discusses the cell membrane, cytoplasm, and nucleus. Within the cytoplasm, it describes the organelles with limiting membranes like the endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, centrosomes, mitochondria and those without limiting membranes like ribosomes and cytoskeleton. Each organelle is described in terms of its structure, composition, location within the cell and specific functions. The document serves as a comprehensive guide to the essential components within the cell and their roles in maintaining cellular activities.
1. A cell is the basic structural and functional unit of living organisms, with over 200 cell types that vary in shape, size, and function.
2. The plasma membrane defines the boundary of the cell and is composed of a lipid bilayer with embedded and peripheral proteins. It regulates what enters and exits the cell.
3. The cytoplasm contains organelles like mitochondria, ribosomes, the endoplasmic reticulum, Golgi apparatus, and lysosomes that carry out specialized functions to keep the cell working properly.
The cell its organells and their functionsSumama Shakir
The document provides information on the structure and functions of eukaryotic cells and their organelles. It discusses the key differences between prokaryotic and eukaryotic cells, and describes the major organelles found in animal and plant cells - including the cell membrane, nucleus, cytoplasm, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, centrosomes, and ribosomes. Each organelle is described in terms of its location, structure, and specific functions within the cell.
The document discusses cell membranes. It describes how cell membranes are made up of lipids like phospholipids and cholesterol that form a bilayer. Proteins are also embedded throughout membranes and help regulate transport of molecules. The membrane acts as a selective barrier, controlling what enters and exits the cell using transport proteins. Membranes surround not just cells but also internal organelles, and their compositions vary by location to support different functions.
Cell Anatomy and physiology ( structure and function for NEET asparients, Biology, MBBS, BPT, Allied, nursing , medical and paramedical students. This is the easiest form of slide share to understand the context better.
The document summarizes key aspects of cell structure and function according to the cell theory. It describes the basic components of cells, including the plasma membrane, nucleus, cytoplasm, and various organelles. It explains that cells are the basic structural and functional units of living organisms, and that their biochemical activities depend on their specific subcellular structures. The key cellular processes of protein synthesis and transport are also summarized.
The document provides information about microscopic anatomy and the cell. It discusses the key differences between prokaryotic and eukaryotic cells, and describes the basic structures and organelles of a typical eukaryotic cell, including the cell membrane, nucleus, cytoplasm, mitochondria, endoplasmic reticulum, Golgi complex, lysosomes, peroxisomes, ribosomes, centrioles, and cytoskeleton. It also covers the functions of these cellular components and structures like the cell membrane, as well as cellular transport mechanisms and intercellular junctions.
Lecture 4 Membrane Structure and Membrane Transport of Small Molecules PT_7.pdfRajveerChoudhary28
The document discusses membrane structure and transport of small molecules across membranes. It begins by introducing the roles and components of cell membranes, including defining compartments and regulating transport. The membrane is composed of lipids like phospholipids and cholesterol, as well as integral and peripheral proteins. Transport across membranes can occur through passive or active methods. Passive transport includes simple diffusion of small soluble molecules and facilitated diffusion using channel or carrier proteins to transport molecules down their concentration gradients without energy.
Here is the updated list of Top Best Ayurvedic medicine for Gas and Indigestion and those are Gas-O-Go Syp for Dyspepsia | Lavizyme Syrup for Acidity | Yumzyme Hepatoprotective Capsules etc
Cell Therapy Expansion and Challenges in Autoimmune DiseaseHealth Advances
There is increasing confidence that cell therapies will soon play a role in the treatment of autoimmune disorders, but the extent of this impact remains to be seen. Early readouts on autologous CAR-Ts in lupus are encouraging, but manufacturing and cost limitations are likely to restrict access to highly refractory patients. Allogeneic CAR-Ts have the potential to broaden access to earlier lines of treatment due to their inherent cost benefits, however they will need to demonstrate comparable or improved efficacy to established modalities.
In addition to infrastructure and capacity constraints, CAR-Ts face a very different risk-benefit dynamic in autoimmune compared to oncology, highlighting the need for tolerable therapies with low adverse event risk. CAR-NK and Treg-based therapies are also being developed in certain autoimmune disorders and may demonstrate favorable safety profiles. Several novel non-cell therapies such as bispecific antibodies, nanobodies, and RNAi drugs, may also offer future alternative competitive solutions with variable value propositions.
Widespread adoption of cell therapies will not only require strong efficacy and safety data, but also adapted pricing and access strategies. At oncology-based price points, CAR-Ts are unlikely to achieve broad market access in autoimmune disorders, with eligible patient populations that are potentially orders of magnitude greater than the number of currently addressable cancer patients. Developers have made strides towards reducing cell therapy COGS while improving manufacturing efficiency, but payors will inevitably restrict access until more sustainable pricing is achieved.
Despite these headwinds, industry leaders and investors remain confident that cell therapies are poised to address significant unmet need in patients suffering from autoimmune disorders. However, the extent of this impact on the treatment landscape remains to be seen, as the industry rapidly approaches an inflection point.
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kol...rightmanforbloodline
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kolb, Ian Q. Whishaw, Verified Chapters 1 - 16, Complete Newest Versio
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kolb, Ian Q. Whishaw, Verified Chapters 1 - 16, Complete Newest Version
TEST BANK For An Introduction to Brain and Behavior, 7th Edition by Bryan Kolb, Ian Q. Whishaw, Verified Chapters 1 - 16, Complete Newest Version
Muktapishti is a traditional Ayurvedic preparation made from Shoditha Mukta (Purified Pearl), is believed to help regulate thyroid function and reduce symptoms of hyperthyroidism due to its cooling and balancing properties. Clinical evidence on its efficacy remains limited, necessitating further research to validate its therapeutic benefits.
- Video recording of this lecture in English language: https://youtu.be/kqbnxVAZs-0
- Video recording of this lecture in Arabic language: https://youtu.be/SINlygW1Mpc
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
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Integrating Ayurveda into Parkinson’s Management: A Holistic ApproachAyurveda ForAll
Explore the benefits of combining Ayurveda with conventional Parkinson's treatments. Learn how a holistic approach can manage symptoms, enhance well-being, and balance body energies. Discover the steps to safely integrate Ayurvedic practices into your Parkinson’s care plan, including expert guidance on diet, herbal remedies, and lifestyle modifications.
2. UNIT -1
Cell
Cell Structure and organelles
Functions of each component in the cell
Cell membrane
Transport across membrane
Action potential (Nernst, Goldman equation),
Homeostasis
Tissue:
Types, functions
3. Cell- Defined as the structural and functional
unit of the living body.
5. Thus, the structure of the cell have
1. Cell membrane
2. Cytoplasm
3. Nucleus.
CELL MEMBRANE
Cell membrane is a protective envelop of the cell
body. It is also known as plasma membrane
6. • This membrane separates the fluid outside
the cell called extracellular fluid (ECF) and the
fluid inside the cell called intracellular fluid
(ICF).
• The cell membrane is a semipermeable
membrane. So, there is free exchange of
certain substances between ECF and ICF.
• Thickness of the cell membrane varies from 75
to 111Å
7. COMPOSITION OF CELL MEMBRANE
Cell membrane is composed of three types of
substances:
1. Proteins (55%)
2. Lipids (40%)
3. Carbohydrates (5%).
8. Structural Model of the Cell
Membrane
Fluid mosaic model
Later in 1972, SJ Singer and GL Nicholson
proposed ‘The fluid mosaic model’. According
to them, the membrane is a fluid with mosaic of
proteins
(mosaic means pattern formed by arrangement
of different colored pieces of stone, tile, glass or
other such materials).
9.
10. Lipid Layers of the Cell Membrane
• The central lipid layer is a bi-layered
structure.
11. • Phospholipid molecules -arranged in two
layers
• The outer part of the phospholipid molecule is
called the head portion and the inner portion is
called the tail portion
• Head portion is the polar end -soluble in
water and has strong affinity for water
(hydrophilic)-outside cell memb-ECF
• Tail portion is the non-polar end. It is insoluble
in water and repelled by water (hydrophobic)-
inside cell memb-ICF
12.
13. Cholesterol
• Cholesterol molecules are arranged in
between the phospholipid molecules.
• Phospholipids are soft and oily structures and
cholesterol helps to ‘pack’ the phospholipids
in the membrane.
• So, cholesterol is responsible for the
structural integrity of lipid layer of the cell
membrane.
14. Functions of Lipid Layer in Cell Membrane
• Lipid layer of the cell membrane is a
semipermeable membrane and allows only the
fat-soluble substances to pass through it.
eg:oxygen, carbon dioxide and alcohol
15. Protein Layers of the Cell Membrane
• Protein layers of the cell membrane are
electron-dense layers.
• These layers cover the two surfaces of the
lipid layer. Protein layers give protection to
the lipid layer.
• The protein substances present in these layers
are mostly glycoproteins.
16. Protein molecules are classified into two
categories:
1. Integral proteins or transmembrane proteins.
2. Peripheral proteins or peripheral membrane
proteins.
1. Integral proteins
• Integral or transmembrane proteins are the
proteins that pass through entire thickness of cell
membrane from one side to the other side.
• These proteins are tightly bound with the cell
membrane.
17. Examples of integral protein:
i. Cell adhesion proteins
ii. Cell junction proteins
iii. Some carrier (transport) proteins
iv. Channel proteins
v. Some hormone receptors
vi. Antigens
vii. Some enzymes.
18. 2.Peripheral proteins
• Peripheral membrane proteins are the proteins
which are partially embedded in the outer and
inner surfaces of the cell membrane and do
not penetrate the cell membrane.
• Examples of peripheral proteins:
i. Proteins of cytoskeleton
ii. Some carrier (transport) proteins
iii. Some enzymes.
19. Functions of Proteins in Cell Membrane
• Integral proteins provide the structural integrity of
the cell membrane
• Channel proteins help in the diffusion of water
soluble substances like glucose and electrolytes
• Carrier or transport proteins help in the transport
of substances across the cell membrane by means
of active or passive transport
• Pump: Some carrier proteins act as pumps, by
which ions are moved.
20. • Receptor proteins serve as the receptor sites for
hormones and neurotransmitters
• Enzymes: Some of the protein molecules form the
enzymes and control chemical (metabolic) reactions
within the cell membrane
• Antigens: Some proteins act as antigens and induce
the process of antibody formation
• Cell adhesion molecules or the integral proteins are
responsible for attachment of cells to their neighbors
or to basal lamina.
21. Carbohydrates of the Cell Membrane
• carbohydrate +proteins =glycoproteins
(proteoglycans).
• Carbohydrate+ lipids =glycolipids.
• Carbohydrate molecules form a thin and loose
covering over the entire surface of the cell
membrane called glycocalyx.
22. Functions of Carbohydrates in Cell
Membrance
• Carbohydrate molecules - negatively charged
and do not permit the negatively charged
substances to move in and out of the cell
• Glycocalyx from the neighboring cells helps in
the tight fixation of cells with one another
• Function as the receptors for some hormones.
23. FUNCTIONS OF CELL MEMBRANE
1.Protective function
2. Selective permeability
3. Absorptive function
4. Excretory function
5. Exchange of gases
6. Maintenance of shape and size of the cell
24. CYTOPLASM
• Jellylike material formed by 80% of water
• clear liquid portion called cytosol
• It contains proteins, carbohydrates, lipids or
electrolytes in nature.
• Cytoplasm also contains many organelles
25. Cytoplasm is made up of two zones:
1. Ectoplasm: Peripheral part of cytoplasm,
situated just beneath the cell membrane
2. Endoplasm: Inner part of cytoplasm,
interposed between the ectoplasm and the
nucleus.
26. ORGANELLES IN CYTOPLASM
• Some organelles are bound by limiting
membrane and
• Others do not have limiting membrane
27. ORGANELLES WITH LIMITING
MEMBRANE
ENDOPLASMIC RETICULUM
• Endoplasmic reticulum is a network of tubular
structures.
• Contains limiting membrane-proteins and
bilayered lipids
• Lumen of endoplasmic reticulum contains a
fluid medium -endoplasmic matrix.
29. • diameter of the lumen is about 400 to 700Å.
• Forms link between nucleus and cell
membrane.
Types of Endoplasmic Reticulum
• Rough endoplasmic reticulum
• smooth endoplasmic reticulum
30. Rough Endoplasmic Reticulum
• Rough appearance is due to the attachment of
granular ribosomes to its outer surface-
granular endoplasmic reticulum
Functions of Rough Endoplasmic Reticulum
1. Synthesis of proteins
2. Degradation of worn-out organelles
31. Smooth Endoplasmic Reticulum
• formed by many interconnected tubules.
• So, it is also called tubular endoplasmic
reticulum.
Functions of Smooth Endoplasmic Reticulum
1. Synthesis of non-protein substance
2. Role in cellular metabolism
3. Storage and metabolism of calcium
4. Catabolism and detoxification
33. • Involved in the processing of proteins.
• each cell has one Golgi apparatus. Some of
the cells may have more than one Golgi
apparatus.
• Each Golgi apparatus consists of 5 to 8
flattened membranous sacs called the
cisternae.
34. • Golgi apparatus is situated near the nucleus.
• It has two ends or faces, namely cis face and
trans face.
• The cis face is positioned near the endoplasmic
reticulum.
• Reticular vesicles from endoplasmic reticulum
enter the Golgi apparatus through
cis face.
• The trans face is situated near the
cell membrane.
• The processed substances make their exit from
Golgi apparatus through
trans face
35. Functions of Golgi Apparatus
• Processing, packing, labeling and delivery of
proteins and other molecules like lipids to
different parts of the cell.
36. Lysosomes
• The lysosomes are formed by Golgi apparatus.
• The enzymes synthesized in rough
endoplasmic reticulum are processed and
packed in the form of small vesicles in the
Golgi apparatus.
• Then, these vesicles are pinched off from
Golgi apparatus and become the lysosomes.
• lysosomes have the thickest covering
membrane-bilayered lipid material.
37. Types of Lysosomes
Two types:
1. Primary lysosome, which is pinched off from
Golgi apparatus. It is inactive in spite of having
hydrolytic enzymes
2. Secondary lysosome, which is the active
lysosome. It is formed by the fusion of a primary
lysosome with phagosome or endosome.
38. Functions of Lysosomes
.
• Lysosomes are often called ‘garbage system’ of
the cell because of their degradation activity.
Important lysosomal enzymes
• Proteases, which hydrolyze the proteins into
amino acids
• Lipases, which hydrolyze the lipids into fatty
acids and glycerides
• Amylases, which hydrolyze the polysaccharides
into glucose
• Nucleases, which hydrolyze the nucleic acids into
mononucleotides.
39. Mechanism of lysosomal function
Lysosomal functions involve two mechanisms:
1. Heterophagy: Digestion of extracellular
materials
2. Autophagy: Digestion of intracellular materials
(worn-out cytoplasmic organelles)
40. Specific functions of lysosomes
1.Degradation of macromolecules
2. Degradation of worn-out organelles
3. Removal of excess secretory products in the
cells
4. Secretory function – secretory lysosomes
41. PEROXISOMES
Peroxisomes are pinched off from endoplasmic
reticulum.
Functions of Peroxisomes
• Breakdown the fatty acids by betaoxidation
• Degrade the toxic substances such as hydrogen
Peroxide (produced by alcohol) and other metabolic
products by means of detoxification.
42. • Form the major site of oxygen utilization in the
cells
• Accelerate gluconeogenesis from fats
• Degrade purine to uric acid
• Participate in the formation of myelin
• Play a role in the formation of bile acids.
43. CENTROSOME AND CENTRIOLES
• Centrosome is the membrane-bound cellular
organelle situated almost in the center of cell,
close to nucleus.
• It consists of two cylindrical structures called
centrioles which are made up of proteins.
• Centrioles are responsible for the movement
of chromosomes during cell division.
44. SECRETORY VESICLES
• Contain the secretory substances.
• Formed in the endoplasmic reticulum and are
processed and packed in Golgi apparatus.
• Present throughout the cytoplasm.
• When necessary, these vesicles are ruptured
and secretory substances are released into the
cytoplasm
46. • Concerned with production of energy.
• rod-shaped or oval-shaped structure with a
diameter of 0.5 to 1 μ.
• It is covered by a bilayered membrane
• The outer membrane is smooth
• This membrane contains various enzymes such
as acetyl-CoA synthetase and
glycerolphosphate acetyltransferase.
47. • The inner membrane is folded in the form of
shelf-like inward projections called cristae
• synthesis of adenosine triphosphate (ATP).
Functions of Mitochondrion
1. Production of energy
2. Synthesis of ATP
3. Apoptosis
4. Other functions- storage of calcium and
detoxification of ammonia in liver.
48. ORGANELLES WITHOUT
LIMITING MEMBRANE
• Ribosomes are the organelles without limiting
membrane.
• These organelles are granular and small dot-like
structures with a diameter of 15 nm.
• 35% of proteins 65% of ribonucleic acid(RNA).
• RNA present in ribosomes is called ribosomal
RNA (rRNA).
• Ribosomes are concerned with protein synthesis
in the cell.
49. Types of Ribosomes
• Ribosomes that are attached to rough
endoplasmic reticulum
• Free ribosomes that are distributed in the
cytoplasm.
50. Functions of Ribosomes
• Ribosomes are called ‘protein factories’
because of their role in the synthesis of
proteins.
51. • Ribosomes attached to rough endoplasmic
reticulum -synthesis of proteins such as the
enzymatic proteins, hormonal proteins,
lysosomal proteins.
• Free ribosomes -synthesis of proteins in
hemoglobin, peroxisome and mitochondria
52. CYTOSKELETON
• Cytoskeleton is the cellular organelle present
throughout the cytoplasm.
• It determines the shape of the cell and gives
support to the cell.
• It is also essential for the cellular movements and
the response of the cell to external stimuli.
54. Microtubules
• straight, hollow and tubular structures of the
cytoskeleton.
• Each tubule has a diameter of 20 to 30 nm.
• Structurally, the microtubules are formed by of
globular protein called tubulin.
• Tubulin has two subunits, namely αsubunit
and βsubunit.
55.
56. Functions of microtubules
• Determine the shape of the cell
• Give structural strength to the cell
• Act like conveyer belts which allow the movement
of granules, vesicles, protein molecules and some
organelles like mitochondria to different parts of the
cell
• Form the spindle fibers which separate the
chromosomes during mitosis
• Are responsible for the movement of centrioles and
the complex cellular structures like cilia.
58. • Intermediate filaments are the structures that
form a network around the nucleus and extend
to the periphery of the cell.
• Diameter of each filament is about 10 nm.
• The intermediate filaments are formed by
made up of fibrous proteins
59. Functions of intermediate filaments
• Intermediate filaments help to maintain the
shape of the cell.
• These filaments also connect the adjacent
cells through desmosomes.
61. • Microfilaments are long and fine thread like
structures with a diameter of about 3 to 6
nm.
• These filaments are made up of non-tubular
contractile proteins called actin and myosin
62. Functions of microfilaments
i. Give structural strength to the cell
ii. Provide resistance to the cell against the
pulling forces
iii. Are responsible for cellular movements like
contraction, gliding and cytokinesis (partition of
cytoplasm during cell division).
64. Structure of the Nucleus
the nuclear
envelope
nucleoplasm
chromatin
the nucleolus
] the two major
types of materials
The Nucleus
65. Features
The nucleus is the genetic control center
of a cell.
In most cells, there is only one nucleus. It
is spherical, making up 10% of the cell’s
volume.
66. Nuclear Envelope
The nuclear envelope is a double-layered
membrane perforated with pores, which
control the flow of material going in and
out of the nucleus.
The outer layer is connected to the
endoplasmic reticulum, communicating
with the cytoplasm of the cell. The
exchange of the large molecules (protein
and RNA) between the nucleus and
cytoplasm happens here.
67. Nucleoplasm
A jelly-like (made mostly of water) matrix
within the nucleus
All the other materials “float” inside
Helps the nucleus keep its shape and serves
as the median for the transportation of
important molecules within the nucleus
68. Chromatin &
Chromosomes
Chromosomes contain DNA in a condensed form
attached to a histone protein.
Chromatin is comprised of DNA. There are two types
based on function.
Heterochromatin: highly condensed,
transcriptionally inactive mostly located
adjacent to the nuclear membrane
Eurochromatin: delicate, less condensed
organization of chromatin, located in a
transcribing cell
* Transcribing means equivalent RNA copies are being made from the DNA to create proteins.
69. Functions
The nucleus is “command center,” as it
controls all functions of the cell.
It regulates the actions of the cells.
It has message to synthesis the cell’s
proteins.