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Flashcards in autonomic BP regulation Deck (15):
1

what is formula for MAP

HR*SV*TPR+Pveins

2

what are 2 effects of symp activation on TPR

1. constriction of resistance vessel in skin, GI, genitals via NA and a-receptors
2. dilatation of vessels in heart and skeleton (B2)

3

what is autonomic response to drop in BP

constrict vessels to raise BP

4

where in particular does autonomic influence change vessel radius

muscular arterioles

5

how else does sypm activation increase MAP

increases HR > more CO

6

how does system know when MAP changed

baroreceptors in cartid sinus

7

what happens to signalling when BP gets too high

send more rapid APs back to control centre

8

where is control centre

medulla

9

what are transmitters for para and symp system

para -ACH
symp - NA

10

what is orthostatic hypotension

stand up quick and pass out because blood not going to brain

11

what normally controls stopping of orthostatic pressure

baroreceptors read and contrict vessels to incr. BP

12

what shift occurs when we eat a large meal

blood goes from art to Vein

13

what is intrinsic response to big meal (2)

higher preload = more CO
lower afterload = more CO

14

what is extrinsic reponse to big meal

1. higher TPR
2. lower vein comliance > higher vein P
3. higher HR and leftward ESPVR

15

what happens to Part for 24 hrs after excercise

reduced for about 24hrs

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