A deviation related to blood pressure could be high blood pressure (hypertension) or low blood pressure (hypotension). Normal blood pressure is below 120/80 mmHg, but it can be elevated or decreased based on various factors. Some examples of factors that can cause deviations in blood pressure include diet, exercise habits, stress levels, medications, drug use, and underlying medical conditions. Precise regulation of blood pressure is important for tissue and organ function throughout the body.
Levels of organization life.
Atome-molecules-cells-tissues-organ-system-organism to the ecospehere.
With interactives exercises for the classroom lesson.
www. biodeluna.wordpress.com/
Levels of organization life.
Atome-molecules-cells-tissues-organ-system-organism to the ecospehere.
With interactives exercises for the classroom lesson.
www. biodeluna.wordpress.com/
Those are a couples of photos showing how Haiti was before and after earthquake. Very devastating. Now Haiti need is sons more than ever to become what it was before and even more
By:M. Thiru murugan
Unit – II:
The cell: Structure, reproduction and function
Tissues including membranes and glands : types, structure and functions
Body cavities and their contents
Cell
Cell is the basic Structural and functional unit
Unicellular Organisms - made up of only one cell
Multicellular Organisms - made up of more than one cell.
Cells vary in shape & size
Types of Cells:
Based on cellular structure, there are two types of cells:
Prokaryotes - Prokaryotic cells have no nucleus.
Eukaryotes - characterized by a true nucleus.
Structures of cell:
It consist of 3 parts:
Cell membrane outer boundary of cell
Nucleus - control center
Cytoplasm material between cell membrane & nucleus
Cell (plasma) membrane:
Cell structure that regulates passage of materials between cell & its environment; aid in protection & support of cell
Cell wall – cell structure that surrounds cell membrane
2. Nucleus
Nucleus - organelle that controls the cell’s activities & contains DNA
Parts of nucleus:
Nuclear envelope - 2 membranes that surround nucleus of a cell
Nucleolus - cell structure that contains RNA & proteins; where ribosomes are made
Chromosomes - threadlike structure in a cell that contains genetic information that is passed on from one generation of cells to the next
Chromatin – long, tangled strands of DNA
3. Cytoplasm
Cytoplasm – (jelly-like) area between nucleus & cell membrane of a cell
Surrounds organelles
Organelle – tiny cell structure that performs a specialized function within the cell
Cell Organelle and its Functions:
Nucleolus: The nucleolus is the site of ribosome synthesis. Also, it is involved in controlling cellular activities and cellular reproduction
Nuclear membrane: The nuclear membrane protects the nucleus by forming a boundary between the nucleus and other cell organelles.
Endoplasmic reticulum: The endoplasmic reticulum is involved in the transportation of substances throughout the cell. It plays a primary role in the metabolism of carbohydrates, synthesis of lipids, steroids and proteins.
Golgi Bodies: Golgi bodies are called the cell’s post office as it is involved in the transportation of materials within the cell
Ribosome: Ribosomes are the protein synthesizers of the cell
Mitochondria: The mitochondrion is called “the powerhouse of the cell.” It is called so because it produces ATP – the cell’s energy
Lysosomes: Lysosomes protect the cell by engulfing the foreign bodies entering the cell and helps in cell renewal. Therefore, it is known as the cell’s suicide bags
Chloroplast: Chloroplasts are the primary organelles for photosynthesis. It contains the pigment chlorophyll
Vacuoles: Vacuoles stores food, water, and other waste materials in the cell
Reproduction
Cell division: Cells need to divide for a number of reasons, including the growth of an organism and to fill gaps left by dead and destroyed cells after an injury, for instance.
There are two types of cell division:
Mitosis
Meiosis
Mitosis:
Mitosis
It presents the history of the Earth through geologic time. It discusses the earth's structure, composition, and processes. Issues, concerns, and problems pertaining to natural hazards are also included. It also deals with the basic principles and processes in the study of biology.
1. Entry slip: Give an example of a deviation related to
blood pressure.
Lesson 5.5 Describe life processes of individual
cells as well as complex organisms
(pp300-303 of McGraw-Hill Ryerson)
I. Terms:
a.Life Processes
2. i. Chemical reactions between tissues
that keep an organism alive.
b.Complex organism: an organism
composed of more than one cell (i.e. a
human).
II. Life Processes:
a.Closely involved in homeostasis, for the
purpose of maintaining a person’s
internal environment.
b.Nervous System:
i. (In terms of an individual) Cell: Nerve
cells connect the body to the brain,
and carry electronic signals between
the two.
ii. (In terms of the whole) Body:
Network of nerves senses information
from inside the body as well as the
environment around the body. The
brain then makes decisions and sends
information to the effectors.
c. Endocrine system:
3. i. Cell: Specific cells are affected by
specific hormones. Some cells make
and secrete hormones.
ii. Body: this system secretes certain
hormones into the bloodstream to be
circulated around the body in order
to give information/instructions to
specific tissues and organs.
d.Immune System:
i. Cell: Some cells in the body are
involved with immunity (WBC’s) and
fight foreign pathogens. Most
individual cells are by themselves
defenceless against an attack.
ii. Body: This system is responsible for
defending cells from foreign
pathogens as well as removing dead
cells (pus).
e.Digestive System:
i. Cell: Receives nutrients from blood
plasma by diffusion.
4. ii. Body: Obtains nutrients from external
environment and transfers them to
blood plasma for use and storage.
Eliminates undigested food as waste.
f. Transportation System:
i. Cell: Receives nutrients and
hormones, exchanges gases, and gets
rid of wastes by diffusion with the
circulatory system.
ii. Body: “picks up” and “drops off”
gases, nutrients, wastes and
hormones at various areas. Also
influences body temperature and
immune response.
g.Excretory System:
i. Cell: Cells produce CO2 and nitrogen-
containing wastes that have to be
removed.
ii. Body: removes N-containing wastes,
excess water and minerals by
5. urination via the nephrons of the
kidney. Exhales CO2 by the lungs.
h.Respiratory System:
i. Cell: Internal respiration (gas
exchange between blood and cell);
cellular respiration (gas exchange
mainly in mitochondria of cells) by
diffusion.
ii. Body: Moves CO2 and O2 between
atmosphere and individual cells, via
the circulatory system.
III. Youtube search:
a.Nervous System-chinchin85
IV.Homework:
a.Which life process is the most important?
In other words, in the absence of which
life process would the human body die
the quickest? Why?
b.-½ a page due next class.