Homeostasis Flashcards
1
Q
Homeostasis
A
- Tendency of body to work towards maintaining a set internal state
- Human body is ALWAYS trying to maintain this
- Dynamic, as internal state is constantly changing
2
Q
3 Components of Feedback Systems
A
Receptor
Control Center
Effector
3
Q
Receptor
A
Monitors and detects change or stimulus affecting homeostasis (Ex receptors on skin)
4
Q
Control Center
A
Analyzes and integrates stimulus (Ex brain)
5
Q
Effector
A
Carries out command from control center to restore homeostasis
6
Q
2 Key Processes
A
Negative Feedback System
Positive Feedback System
7
Q
Negative Feedback System
A
Most common!
End result is a decrease in original stimulus, restoring homeostasis (Ex thermostat in house; loss of water - drop in blood pressure - ADH released - water retained etc)
8
Q
Positive Feedback System
A
The effector causes more of the original stimulus to occur (until physiological process finishes Ex childbirth)
