KROK 1 2021 – Question 34 · KROK (Medicine) · Physiology
An isolated cell of a human heart automatically generates excitation impulses at the rate of 60/min. This cell was obtained from the:
- A. Atria
- B. Ventricles
- C. Sinoatrial node
- D. Atrioventricular node
- E. His bundle
Hint
Compare the intrinsic rates of the heart's pacemakers, which fall progressively from the top to the bottom of the conduction system, and place 60 per minute on that gradient.
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