Which is the pacemaker of human heart:
Correct answer: B. SA node
- A. AV node
- B. SA node
- C. Purkinjie fibres
- D. Bundle of His
Explanation
SA node generates impulses that initiate heartbeats.
This question appeared on the UHS MDCAT 2018 paper, which you can sit online with every answer explained.
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The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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