1 sec
1 minute
1.5 sec
0.8 second
Answer is Wrong!
Answer is Right!
The correct answer is D. 0.8 second.
A normal heart beat cycle takes about 0.8 seconds to complete. This includes the time it takes for the heart to contract (systole) and relax (diastole). The heart rate is the number of heart beats per minute. A normal resting heart rate for adults is between 60 and 100 beats per minute.
Option A is incorrect because it takes less than 1 second for the heart to complete one beat. Option B is incorrect because it takes much longer than 1 minute for the heart to complete one beat. Option C is incorrect because it takes less than 1.5 seconds for the heart to complete one beat.