(a)[4]
Outline how a negative feedback mechanism operates.
(b)[4]
With reference to Fig. 8.1, Describe how the nervous system helps control blood glucose concentration.
(c)[4]
If the core temperature of the human body decreases, the hypothalamus sends impulses that activate several physiological responses, some of which are listed below. For each one, state how it would help return the core temperature to normal. vasoconstriction shivering increasing secretion of adrenaline