In your physiology class while you learn to take a pulse of your healthy looking classmate you notice it is very slow, about 50 bpm. Is that the reason for concern?

Question

Quizplus · Accepted Answer

Endurance training can lead to a slower heart rate due to an increase in stroke volume. It is a normal adaptation to training and not a cause for concern. Option A is incorrect as a slow heart rate alone does not necessarily indicate the need for a pacemaker. Option B is incorrect as sympathetic activation would increase heart rate, not decrease it. Option D is incorrect as a low carbohydrate diet does not directly affect action potentials in cardiac muscles.

In Your Physiology Class While You Learn to Take a Pulse