First slide

Regulation of Cardiac Activity

Question

Cardiac output is increased by

Moderate

A

sympathetic neural system only
B

adrenally medullary hormones only
C

sympathetic neural system and adrenally medullary hormones
D

parasympathetic neural system and adrenally medullary hormones

Solution

Neural signals through the sympathetic nerves (part of ANS) can increase the rate of heart beat, the strength of ventricular contraction and thereby the cardiac output. Adrenal medullary hormones can also increase the cardiac output.

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