BP Control

Question 1

True or False? SNS is most important for circulation control.

Answer 1

True

Question 2

Where is the vasomotor center located?

Answer 2

Medulla and lower 1/3 of pons

Question 3

The Vagus nerve is associated with ____.

Answer 3

PNS

Question 4

Spinal cord and peripheral nerves are associated with _____.

Answer 4

SNS

Question 5

All levels of spinal cord to preganglionic SNS neurons are located in what vasomotor region?

Answer 5

vasoconstrictor

Question 6

Inhibition of vasoconstrictor activity takes place in what vasomotor region?

Answer 6

Vasodilator

Question 7

What vasomotor region receives vagus and glossopharyngeal nerves and stimulates vasoconstrictor/vasodilator regions?

Answer 7

Sensory Area

Question 8

How does the vasoconstrictor area constrict?

Answer 8

norepinephrine binds to alpha receptors activating constriction

Question 9

SNS stimulates the _____ (gland).

Answer 9

adrenal medulla

Question 10

True or False? In some tissues epinephrine will cause vasodilation via _____ receptors. Bronchial dilation and skeletal local dilation.

Answer 10

Beta

Question 11

Cardioaccelerator is located in the _____.

Answer 11

medulla

Question 12

____ primary function is to control minute by minute BP.

Answer 12

baroreceptor

Question 13

Where in the carotid sinus are baroreceptors located and what nerve is it associated with?

Answer 13

Hering N fibers, glossopharyngeal

Question 14

Where in the aortic arch are the baroreceptors located and what nerve is it associated with?

Answer 14

Hering N, vagus

Question 15

True or False? Baroreceptors act on medulla to inhibit PNS and excite SNS.

Answer 15

False. Baroreceptors act on medulla to activate PNS and inhibit SNS.

Question 16

Going from supin to sitting ____ venous return and BP.

Answer 16

decreases

Question 17

True or False? Low blood pressure in the brain causes an extreme sympathetic response.

Answer 17

True

Question 18

What is the CNS Ischemic response?

Answer 18

Tries to bring blood pressure up by shutting down all blood flow to non-essential organs.

Question 19

_____ is increased urination in response to elevated BP.

Answer 19

Pressure Diuresis

Question 20

____ is triggered by pressure in tubules.

Answer 20

Pressure Diuresis

Question 21

_____ is triggered by pressure in atria and ventricles.

Answer 21

Pressure Natriuresis

Question 22

______ is renal excretion of Na in response to elevated BP.

Answer 22

Pressure Natriuresis

Question 23

What are the two major determinants of arterial pressure?

Answer 23

• daily sodium and fluid intake

- renal function curve

Question 24

___ regulates MAP by short term mechanisms (ANS).

Answer 24

TPR

Question 25

_____ regulates MAP by long term mechanisms (renal).

Answer 25

CO

Question 26

CO increases MAP by direct _______ and indirect ______.

Answer 26

increased BP, autoregulation

Question 27

What is the difference between salt sensitivity and salt insensitivity?

Answer 27

• insensitive means variety salt intake does not effect BP (normal renal function)
• sensitivity means salt intake level does effect BP (renal disease/dysfunction)

Question 28

True or False? Small amount of Na accumulation can lead to significant increase in BP.

Answer 28

True