16.2 feedback mechanisms

Question 1

explain what negative feedback is

Answer 1

deviation from the optimum point results in the system returning to normal

Question 2

explain why negative feedback is important in maintaining a system at a set point

Answer 2

if the information is not fed back once an effector has corrected any deviation ad returned to a set point, the receptor will continue to stimulate the effector and an over- correction will lead to a deviation in the opposite direction from the original one

Question 3

explain the advantage of having separate negative feedback mechanisms to control deviation away from normal

Answer 3

it gives a greater degree of homeostatic control