Active transport
Types of Active Transport
Primary Active transport
Sodium-Potassium pump
secondary Active transport
uniport, Symport, Antiport
Endocytosis
Types of endocytosis
Phagocytosis
Pinocytosis
Receptor-mediated endocytosis
Exocytosis
Purposes of Endocytosis and Exocytosis
Passive Transport
Types of Passive Transport
Diffusion
Osmosis
Facilitated Diffusion
What causes diffusion?
Why is diffusion useful?
Supercritical fluid
Osmotic Solutions
Isotonic Solution
Hypertonic Solution
Hypotonic Solution
Types of Osmosis
Difference Between Endosmosis And Exosmosis
Significance of Osmosis
Factors Affecting Facilitated Diffusion
Importance of Facilitated Diffusion
Transmembrane Proteins
Channel Proteins and carrier protein
Active transport
Types of Active Transport
Primary Active transport
Sodium-Potassium pump
secondary Active transport
uniport, Symport, Antiport
Endocytosis
Types of endocytosis
Phagocytosis
Pinocytosis
Receptor-mediated endocytosis
Exocytosis
Purposes of Endocytosis and Exocytosis
Passive Transport
Types of Passive Transport
Diffusion
Osmosis
Facilitated Diffusion
What causes diffusion?
Why is diffusion useful?
Supercritical fluid
Osmotic Solutions
Isotonic Solution
Hypertonic Solution
Hypotonic Solution
Types of Osmosis
Difference Between Endosmosis And Exosmosis
Significance of Osmosis
Factors Affecting Facilitated Diffusion
Importance of Facilitated Diffusion
Transmembrane Proteins
Channel Proteins and carrier protein
1. Compare the 3 ways in which water and smaller solutes can be tran.pdfarrowvisionoptics
1. Compare the 3 ways in which water and smaller solutes can be transported across the cell
membrane. How is this different from bulk transport?
2. Describe how hypotonic, isotonic, and hypertonic solutions affect water balance in cells.
3. What are the two forces directing movement of ions across a membrane?
4. Explain how an electrochemical gradient can facilitate coupled transport.
5. Explain how large particles and molecules such as proteins and polysaccharides cross the
plasma membrane.
Solution
The three ways in which water and smaller molecules can be transported across the cell
membrane are,
1). Simple diffusion is a process of passive transport in which molecules diffuse down their
concentration gradient. Diffusion of molecules mainly depends on the lipid solubility and their
size and polarity.
Small molecules such as water, gases such as oxygen, carbon dioxide, ions such as hydrogen
ions, etc. can pass through the cell membranes and membranes of cellular organelles by means of
simple diffusion.
2). Facilitated diffusion: Facilitated diffusion involves the transport of transport of molecules
using the membrane bound proteins. For example, ion channels allow the transport of ions into
and out of the cell, which are otherwise, cannot pass through cell membrane. Glucose binds to
the carrier molecule present on the cell membrane, and enter into the cell; this process is
facilitated by insulin.
3). Active transport: Active transport needs energy, and it help to move ions against their
concentration gradients. The concentration of some of the ions is more inside the cell and some
is more outside the cell. For example, the concentration of sodium ions is more outside the cell.
Still, the sodium ions move from the inside of cell to outside through ion channels, by means of
active transport.
Bulk transport:
It is the transport of macromolecules into and out of the cell by to processes known as
Exocytosis or endocytosis. It involves the action of transport vesicles. Eg: Bulk transport of
proteins..
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Osmosis and Diffusion
Diffusion and Osmosis in an egg
Low concentration
1.1 Diffusion is the process of molecules spreading from areas of high concentration to areas of low concentration.
High concentration
1.1 Osmosis is the diffusion of water molecules through a semi permeable membrane from the area of low concentration of solute to the area of high concentration of solute.
1.2 Diffusion is important to living cells because it s the way they take in materials from the environment, and they also prevent themselves of unwanted materials produced in their cells. Osmosis on the other hand, is also important to living cells, because it s the way that water can enter and leave their cells through diffusion (class note the movement of molecules).
1.3 Aim:...show more content...The egg with the most amount of sucrose solution gained the most weight.
4.1 Specific organism involved in Osmosis and diffusion:
In the human body osmosis and diffusion is involved in the process of cleaning/filtering the kidney, where diffusion is used to selectively move solutes through the cells and Osmosis is used to absorb 99% of the water (Ivyrose Ltd. 2003).
4.2 How osmosis and diffusion is used in the kidneys:
Diffusion is a form of transport, which requires no energy (passive transport), and allows substances to flow from areas of high concentration, to areas of low concentration, and Osmosis happens when water is flowed from areas of high concentration, to areas of low concentration.
In the case of the kidneys, when human kidneys filter/clean blood it uses three mechanisms, two of the mechanisms is, Osmosis and diffusion. Most of the energy that our kidneys consume is reabsorbed by sodium ions (Na+), w
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2. What is cellular transport? Cellular transport is the process of moving materials into and out of the cell. Materials such as water, sugar(glucose), oxygen, and carbon dioxide into and out of cells because they are needed to carry out important reactions in the cell. These reactions are responsible for creating food within cells and producing energy.
3. How can cellular transport be categorized Cellular transport can be categorized into one of three groups: Passive Transport Active Transport
4. What is Passive Transport? Passive transport is the movement of materials across the cell membrane with out the use of energy. When passive transport occurs molecules are transported across the cell by way of a process known as diffusion.
5. What is diffusion Diffusion is the movement of molecules from an area where there is more of them to an area where there is less of them. These molecules continue to move until equilibrium is reached.
6. What is equilibrium? Equilibrium occurs when molecules of one substance are evenly spread through out another substance
7. Lets Talk about Osmosis!!!! Osmosis is the diffusion of water. This type of diffusion has a special name because water is vital to life of the cell
8. Now its time for one more type of passive transport!!!! Facilitated diffusion is the final type of passive transport we will learn about today. Facilitated diffusion is a process which occurs with substances like sugar (glucose) that are too large to pass through the cell membrane by diffusion. These substances enter and leave the cell through transport proteins which are like doorways into the cell for certain substances.
