Phys 7 Flashcards
1
Q
MAP =
A
CO x TPR = HR x SV x TPR = 2/3 (DBP) + 1/3 (SBP)
*how we maintain BP
2
Q
How does the baroreceptor reflex work?
A
respond to changes in arterial pressure, and fire to return it back to normal (^stretch = ^ firing)
*rate»>magnitude
3
Q
What receptors stimulate renin release? what cells secrete renin?
A
- beta 1 adrenergic receptors
2. Juxtaglomerular cells
4
Q
When is natriuretic peptide secreted? ADH?
A
- excessive preload of atria/ventricles (too much stretch)
2. low bp
5
Q
In response to increased blood volume, we have…
A
- an increase in preload, ANP secretion, and HR
- a decrease in ADH secretion
- Renal vasodilation
6
Q
During exercise, what happens to the pulse pressure? SBP? DBP?
A
- increase
- increase
- no change
