Homeostasis Flashcards
1
Q
What is homeostasis?
A
All the processes that maintain optimal body conditions.
2
Q
Why do optimal conditions need to be maintained?
A
If conditions aren’t optimal, enzymes may not work as efficiently or even denature, slowing metabolic reactions.
3
Q
What conditions are regulated by homeostasis?
A
- Carbon dioxide levels
- Water levels
- Internal body temperature
- Blood sugar levels
- Urea concentration (in urine)
4
Q
What are the 3 components of control systems?
A
- Receptors
- Coordination centres
- Effectors
5
Q
What are receptors?
A
Cells that detect changes in the environment
6
Q
What are coordination centres?
A
Receive and process information arriving from receptor cells
7
Q
What are effectors?
A
Carry out responses to stimuli to help restore optimum levels
8
Q
What is negative feedback?
A
The action taken by the body to return something to an optimal level
9
Q
What is the process of negative feedback?
A
- An internal condition changes.
- Change detected.
- Corrective mechanisms activated.
- Internal conditions return to normal.
- Corrective mechanisms deactivated.
- Cycle repeats.
10
Q
What is the optimum human body temperature?
A
37°C
