KROK 1 2007 – Question 176 · KROK (Medicine) · Physiology
An isolated cell of human heart automatically generates excitation impulses with frequency 60 times pro minute. What heart structure was this cell obtained from?
- A. His’ bundle
- B. Ventricle
- C. Atrioventricular node
- D. Atrium
- E. Sinoatrial node
Hint
Cardiac pacemaker tissues fire at different intrinsic rates, and the fastest one normally drives the whole heart; match a rate of 60 per minute to the right tissue.
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