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3.3 Maintaining internal environments

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Question 22
F

When the body becomes too cold, a person starts to shiver.

Which statement explains how shivering helps to warm the body?

[1]
A

Skin cells respire more slowly, so less energy is lost from the skin surface.

B

Muscles contract quickly, and this squeezes warm blood towards the skin.

C

Muscles contract quickly, and respiration in the muscles releases heat.

D

Blood vessels near the skin dilate, so more heat reaches the skin surface.

Markscheme

3.3 Maintaining internal environments Questions

  1. GCSE
  2. /Biology
  3. /3.3 Maintaining internal environments

72 exam-style questions on OCR GCSE Biology 3.3 Maintaining internal environments, covering 3.3.1 Importance of a constant internal environment, 3.3.2 The skin and body temperature, 3.3.3 Insulin and blood sugar, 3.3.4 Glucagon and blood sugar, 3.3.5 Type 1 and type 2 diabetes, 3.3.6 Osmotic changes in body fluids, 3.3.7 Kidneys and water balance, 3.3.8 Structure of the kidney and tubule, 3.3.9 ADH and kidney tubule permeability, and 3.3.10 Responses to temperature and osmotic challenges. Each one has a worked solution and a mark scheme showing where the marks go.

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