Question

Explain how your body maintains homeostasis in response to different external factors such as temperature and
stress. Write your answer in at least 2 sentences. (Unit 2 lesson 9)

(2 points)

Answer 1

The body maintains homeostasis using sensors, a control center (mainly the hypothalamus), and effectors in negative feedback loops that counteract external changes to keep internal conditions near a set point. For temperature changes the hypothalamus activates effectors such as sweat glands and skin vasodilation to cool you, or shivering and vasoconstriction to warm you. For stress the sympathetic nervous system and the HPA axis release hormones like adrenaline and cortisol to raise heart rate and mobilize energy, and once the threat passes parasympathetic signals and hormonal feedback restore baseline.