Positive and Negative Feedback

Question 1

What is Negative Feedback?

Answer 1

Receptors detect a change away from the normal/optimum

Question 2

How does negative feedback work?

Answer 2

• 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

Question 3

NEGATIVE FEEDBACK - what do receptors do?

Answer 3

Receptors detect a change away from the normal/optimum

Question 4

NEGATIVE FEEDBACK - what do effectors do?

Answer 4

• effectors activate mechanisms to return the body to normal/optimum

Question 5

How do you control negative feedback?

Answer 5

• separate negative feedback systems gives you more control

Question 6

What is positive feedback?

Answer 6

• A response that results in the effectors further amplifying the change away from the normal “more produces more”

Question 7

What is positive feedback use for?

Answer 7

• rapid changes and responses

Question 8

What are examples of positive feedback?

Answer 8

• sodium channels threshold - depolarisation
• blood clotting