Biology Topic Practice

Thermoregulation

The human body maintains its core temperature at approximately 37°C to keep enzymes working at their best.

Can you explain the role of sweat in cooling?

What is Thermoregulation?

"Thermoregulation is the homeostatic process by which the body maintains an optimal internal temperature of approximately 37°C."

Question 1

Which response helps cool the body when body temperature is too high?

Question 2

What happens when the body is too cold?

Question 3

Which part of the body monitors and controls body temperature?

Temperature Responses

Too hot: Vasodilation and sweat production (evaporative cooling) transfer energy to the skin.

Too cold: Vasoconstriction and shivering (muscle respiration) generate and conserve heat.

Exam Tip

The thermoregulatory centre is located in the hypothalamus in the brain.

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