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Adrenal medullary hormones can

AConvert myocardium into smooth muscle
BDecrease heart rate and stroke volume
CIncrease cardiac output and heart rate
DStop the SAN action potential firing
Answer & Solution
Correct answer: C. Increase cardiac output and heart rate
Adrenaline and noradrenaline from the adrenal medulla raise heart rate and stroke volume, increasing cardiac output. Sympathetic ANS works in parallel parasympathetic ANS does the opposite.
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