Essentials of Anatomy and Physiology

313

Inhibit

vasomotor

center

Vasodilation

decreases

peripheral

resistance

Heart rate

slows,

decreases

cardiac output

B. P.

decreases to

normal range

B. P.

decreases

further

Stimulate

cardioinhibitory

center

Pressoreceptors in
carotid and aortic
sinuses stimulated

B. P.

increases

further

B. P.

increases to

normal

range

Vasoconstriction

increases

peripheral

resistance

Heart rate

and cardiac

output

increase

Stimulate

vasomotor

center

Stimulate

cardio-

accelerator

center

Pressoreceptors in

carotid and aortic

sinuses inhibited

Figure 13–13. Nervous mechanisms that regulate blood pressure. See text for

description.

QUESTION:What kind of sensory information is used to make changes in BP, and

where are the receptors located?