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7.3 Homeostasis and thermoregulation

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Question 21
H

The table shows measurements from a person before and after entering a cool room.

Table

MeasurementBeforeAfter
Skin blood flow in arbitrary units8032
Skin temperature in ∘C^\circ\mathrm{C}∘C3328
Core temperature in ∘C^\circ\mathrm{C}∘C37.036.9

Which statement correctly links the change in blood flow to thermoregulation?

[1]
A

a 40%40\%40% decrease reduces heat transfer from the core to the skin

B

a 60%60\%60% decrease increases heat transfer from the core to the skin

C

a 60%60\%60% decrease reduces heat transfer from the core to the skin

D

a 40%40\%40% decrease increases heat transfer from the core to the skin

Markscheme

7.3 Homeostasis and thermoregulation Questions

  1. GCSE
  2. /Biology
  3. /7.3 Homeostasis and thermoregulation

44 exam-style questions on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one has a worked solution and a mark scheme showing where the marks go.

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