A-LevelBiologyTransport in mammalsFeb/Mar 2017Paper 1 Q331 Mark
The contraction of the heart is coordinated through electrical impulses passing through the cardiac muscle. What is the correct order of part of the sequence of these impulses?
Aright and left atria → atrioventricular node → Purkyne tissue → ventricular walls
Bright and left atria → Purkyne tissue → ventricular walls → atrioventricular node
Cright and left atria → sinoatrial node → atrioventricular node → ventricular walls
Dsinoatrial node → right and left atria → Purkyne tissue → atrioventricular node
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of transport in mammals within the Biologysyllabus. The examiner's mark scheme requires...
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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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