Under normal circumstances, the factors responsible for making delicate adjustments to the heart rate as circulatory demands change are __________.

a. nerve activity and muscular activity
b. cardiac output and stroke volume
c. autonomic activity and circulatory hormones
d. all of the listed factors


Ans: c. autonomic activity and circulatory hormones

Anatomy & Physiology

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Fill in the blank(s) with correct word

Anatomy & Physiology