KROK 1 2012 – Question 118 · KROK (Medicine) · Physiology
An isolated cell of human heart automatically generates excitement impulses with frequency of 60 times per minute. This cell was taken from the following heart structure:
- A. Sinoatrial node
- B. Ventricle
- C. Atrium
- D. Atrioventricular node
- E. His’ bundle
Hint
The conducting system of the heart shows a gradient of intrinsic firing rates; compare the given frequency with the typical automatic rate of each level of the system.
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