2. What is Homeostasis?
Homeostasis is the maintenance and regulation of
the internal environment within the body.
The body is not maintaining a constant environment
but rather a narrow range of conditions
The body is organized so that it has many controls in
place to maintain a healthy environment
4. Levels of
organization
1. Cells – Each type is specialized
2.
3.
4.
5.
to perform specific functions.
Tissues – Groups of similar cells
that work together.
Organs – Groups of different
tissues working together.
Organ Systems – Different
organs working together.
Organism – Organ systems
working together to maintain
life.
5.
6. Feedback Mechanisms
Negative Feedback Loop
Positive feedback Loop
Negative feedback mechanisms Positive feedback loops
counteract or reverse changes
increase the rate of change
within the body if conditions
away from the normal
move above or below the
range
narrow range of conditions
Very Common in the body
Not very common in the body
11. Long Term Effects
Long term disruption of homeostasis can cause lasting
damage.
Example: Diabetes
If the body fails to regulate blood glucose levels properly it
can affect the entire body
Kidneys excrete excess glucose and water
Fat used as energy causes increased blood acidity
Normal cellular function is compromised throughout the body