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Nerve impulses from ANS and hormones like epinephrine

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can modify the rate of heart beat but not the cardiac output

establish the fundamental rhythm of the heart

can modify the rate and strength of the heartbeat

are not concerned with the functioning of heart as SAN sets the pace

answer is C.

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Detailed Solution

Nerve impulses from the autonomic nervous system (ANS) and blood-borne hormones (such as epinephrine) modify the timing and strength of each heartbeat, but they do not establish the fundamental rhythm.

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