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2.2 Animal tissues, organs and organ systems

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Question 21

During heart surgery, a surgeon finds that fatty material has narrowed one of a person's coronary arteries. Which statement describes how this narrowing affects the heart muscle?

[1]
A

The heart muscle receives deoxygenated blood instead

B

Oxygenated and deoxygenated blood mix inside the heart

C

Blood flows backwards through the heart valves

D

Less oxygenated blood reaches the heart muscle

Markscheme

2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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