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2.2 Animal tissues, organs and organ systems

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Question 74

A patient has a stent in a coronary artery. A blood clot forms on the stent and completely stops blood flow through the artery. Doctors quickly remove the clot.

The contractions of the affected part of the heart muscle are weak while the artery is blocked. The contractions become stronger after blood flow is restored.

a.

Give the name of the sugar supplied to heart muscle cells for respiration.

[1]
b.

Explain the change in the strength of the heart muscle contractions.

[4]
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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