Blood pressure regulation

Question 1

What is the equation for mean arterial pressure?

Answer 1

MAP = CO x TPR

Question 2

What does vasodilation do to the MAP?

Answer 2

Decrease

Question 3

What does vasoconstriction do to the MAP?

Answer 3

Increase

Question 4

What effects do bradykinin and histamine have on vasculature?

Answer 4

Vasodilators

Question 5

Acute regulation of blood flow alters what vascular mechanism?

Answer 5

Resistance

Question 6

Long term regulation of blood flow alters what vascular mechanism?

Answer 6

Volume

Question 7

What is the function of the nucleus of the solitary trac (NTS)?

Answer 7

1. Integrates all sensory information from periphery 2. Sends signals to cardioinhibitory center and vasomotor center

Question 8

What is the function of the rostroventral lateral medulla (RVLM)?

Answer 8

1. Vasoconstrictor center 2. Last site before spinal cord for SNA

Question 9

What is the function of the CVLM?

Answer 9

1. Vasodilatory center 2. Inhibitory for RVLM

Question 10

What is the function of the cardioinhibitory center?

Answer 10

1. Sends projections along vagus to heart 2. Activation slows heart rate

Question 11

Is the arterial baroreflex activated by high or low pressure?

Answer 11

High

Question 12

Is the cardiopulmonary baroreflex activated by high or low pressure?

Answer 12

Low

Question 13

Peripheral input on the chemoreflex illicts what response?

Answer 13

Vasoconstriction

Question 14

Central input on the chemoreflex illicits what response?

Answer 14

Vasoconstriction AND vasodilation, depending on the vascular bed

Question 15

What two scenarios exist to increase BP via the kidneys?

Answer 15

1. Less output or high pressure 2. Increase water or salt intake