Phys 7

Question 1

MAP =

Answer 1

CO x TPR = HR x SV x TPR = 2/3 (DBP) + 1/3 (SBP)

*how we maintain BP

Question 2

How does the baroreceptor reflex work?

Answer 2

respond to changes in arterial pressure, and fire to return it back to normal (^stretch = ^ firing)
*rate»>magnitude

Question 3

What receptors stimulate renin release? what cells secrete renin?

Answer 3

1. beta 1 adrenergic receptors

2. Juxtaglomerular cells

Question 4

When is natriuretic peptide secreted? ADH?

Answer 4

1. excessive preload of atria/ventricles (too much stretch)

2. low bp

Question 5

In response to increased blood volume, we have…

Answer 5

1. an increase in preload, ANP secretion, and HR
2. a decrease in ADH secretion
3. Renal vasodilation

Question 6

During exercise, what happens to the pulse pressure? SBP? DBP?

Answer 6

1. increase
2. increase
3. no change