NUTRITION
THE HUMAN BODY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Our heart beats ____ times in a minute.
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62
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70
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75
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72
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Explanation:
Detailed explanation-1: -The human heart beats about 72 times in a minute. Therefore, frequency of our heart beat is 72/60 or 1.2 Hz. This frequency is much less than the audible range.
Detailed explanation-2: -The power of heart which beats 72 times in a minute is 1.2 kW.
Detailed explanation-3: -A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.
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