A-LevelBiologyTransport in mammalsFeb/Mar 2023Paper 1 Q321 Mark
Heart surgery may cause a decrease in the transmission of impulses in the Purkyne tissue to the right side of the heart. What is a possible effect of this decrease?
AImpulses would be delayed by the atrioventricular node.
BThe muscle of the right ventricle would contract slightly more slowly than the muscle of the left ventricle.
CThe muscle of the right atrium would not contract as fully as the muscle of the left atrium.
DThe sinoatrial node would transmit fewer impulses.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of transport in mammals within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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