IB Biology SL D3.3.6 Thermoregulation Mechanisms Questions

Learn how mammals cool through sweating, vasodilation and flattened hairs, and warm through vasoconstriction, reduced sweating, shivering, metabolic heat and brown fat.

Exam points

Explain how vasodilation and sweating increase heat loss when body temperature is high.
Explain how shivering and brown fat generate heat in cold conditions.

[Maximum number: 1]

These results were obtained by measuring the body temperature of people exercising on a hot and humid day.

Figure for Question IB Biology SL D3.3.6 Thermoregulation Mechanisms Questions question 1 — IB Biology SL

What mechanism could result in the changes seen during rest periods?

Shivering

Uncoupled respiration in brown adipose tissue

Vasodilation in the skin

Hair erection

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IB Biology SL D3.3.6 Thermoregulation Mechanisms Questions question 1