Positive and Negative Feedback Flashcards
1
Q
What is Negative Feedback?
A
Receptors detect a change away from the normal/optimum
2
Q
How does negative feedback work?
A
- Receptors detect a change away from the normal/optimum
- effectors activate mechanisms to return the body to normal/optimum
- control and regulation
- e.g. blood op/PH/glucose
3
Q
NEGATIVE FEEDBACK - what do receptors do?
A
Receptors detect a change away from the normal/optimum
4
Q
NEGATIVE FEEDBACK - what do effectors do?
A
- effectors activate mechanisms to return the body to normal/optimum
5
Q
How do you control negative feedback?
A
- separate negative feedback systems gives you more control
6
Q
What is positive feedback?
A
- A response that results in the effectors further amplifying the change away from the normal “more produces more”
7
Q
What is positive feedback use for?
A
- rapid changes and responses
8
Q
What are examples of positive feedback?
A
- sodium channels threshold - depolarisation
- blood clotting
