KROK 1 2007 – Question 26 · KROK (Medicine) · Physiology
A peripheral segment of vagus nerve on a dog’s neck was being stimulated in course of an experiment. The following changes of cardiac activity could be meanwhile observed:
- A. Heart hurry
- B. Heart rate and heart force amplification
- C. Increased excitability of myocardium
- D. Heart rate fall
- E. Enhancement of atrioventricular conduction
Hint
Think about what acetylcholine released by the efferent vagal endings does to pacemaker cells of the sinoatrial node and to conduction through the atrioventricular node.
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