If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells, .
A) it would be less than 1-2 m
B) tetanic contractions might occur, which would stop the heart's pumping action
C) it would be much longer before cardiac cells could respond to a second stimulation
D) contractions would last as long as the refractory period

Question

Quizplus · Accepted Answer

The absolute refractory period in cardiac muscle cells is longer than in skeletal muscle cells to prevent tetanic contractions, which would impair the heart's ability to pump blood effectively. If the refractory period were shorter, like in skeletal muscle, tetanic contractions could occur, disrupting the heart's function.

If the Length of the Absolute Refractory Period in Cardiac