regulation of peripheral/coronary circulation

Question 1

arteries info

Answer 1

high compliance for systole, elastic recoil– propel during diastole, continuous flow, absorb/redilver energy

Question 2

decreased compliance in arteries leads to

Answer 2

increased systolic pressure, pulsitilel flow

Question 3

pressure pulse

Answer 3

feel elastic recoil before blood, increased velocity with stiff walls.

Question 4

neural regulation of arteries

Answer 4

reflex BP pathway, change HR/SV to change CO, constrict artery, increase TPR, BP

Question 5

barrow receptors regulate?

Answer 5

arteries

Question 6

barrow receptors work at what MAP

Answer 6

75-150

Question 7

barrow receptors action

Answer 7

depol based on stretch, frequency mod, travel to medulla,

Question 8

carotid vs aortic bara afferent

Answer 8

CNIX/CN X

Question 9

barroreceptor efferent

Answer 9

para: X, sympa: AV/SA

Question 10

arterioles

Answer 10

largest pressure drop, pulsatile to dampen pressure (highest R), regulate TPR (constrict/relax)

Question 11

autorelation occurs where?

Answer 11

arterioles

Question 12

autoregualtion process

Answer 12

local control of blood flow without ANS involved. tissue flow can remain constant with arterial change

Question 13

autoreg. mech

Answer 13

Myogenic and metabolic

Question 14

myogenic

Answer 14

increase P, increase stretch SM, open CA channel, increase NA current depolarization and ca entrance… CONSTRICT

Question 15

metabolic

Answer 15

increase flow, bring in constrictors (wash away dilators).. decrease flow, accumulate dilators

Question 16

capillary regulation via

Answer 16

microcirculation

Question 17

microcirucaltion

Answer 17

flow between tissues

Question 18

vein info

Answer 18

capacitance vessel. thin walls, hold more blood, low P, valves, sypma and skew muscle further contract

Question 19

coronary regulation

Answer 19

only way to increase 02 delivery is to increase flow. A1 sympathy/ADENOSINE