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11/10/2021 6:52 pm
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(a) What is meant by ‘heart beat’? What is the usual heartbeat rate at rest?
(b) What change occurs in heartbeats if a person runs for a while? Why?
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11/10/2021 6:54 pm
(a) Heart beat: One complete contraction and relaxation of the heart is called a heart beat. The usual heart beat rate at rest is 72 times /minute.
(b) The heart beats faster when a person runs for a while because the body needs more energy under these conditions.