At a heart rate of 60 beats/minute,a cardiac cycle lasts
A)60 seconds.
B)60 milliseconds.
C)1 second.
D)370 milliseconds.
E)630 milliseconds.

Question

Quizplus · Accepted Answer

One cardiac cycle includes the contraction and relaxation of the heart chambers. At a heart rate of 60 beats/minute, the duration of each cardiac cycle is 60 seconds divided by 60 beats (or contractions) per minute, which equals 1 second per cycle.

At a Heart Rate of 60 Beats/minute,a Cardiac Cycle Lasts