organ blood flow short

Question 1

basal flow

Answer 1

flow to organ at rest - fasted, resting, normal environment (temp and humidity)

Question 2

vascular tone

Answer 2

ratio of basal flow: to max flow of organ. lower the basal flow, higher the vascular tone

Question 3

vasodilator reserve

Answer 3

diff between basal flow and max flow to an organ

Question 4

local regulation

Answer 4

intrinsic organ ability to regulate own blood flow in absecne of extrinsic factors (neurohormonal)

Question 5

paracrine hormone

Answer 5

substance released by one cell that acts on another nerby cell by diffusing through interstitial fluid

Question 6

endocrine hormone

Answer 6

circulates in blood to reach distant target cells

Question 7

autocrine substances

Answer 7

affect same cell from which they are released

Question 8

functional sympatholysis

Answer 8

sympathetic on heart - B1 increases HR, A1 vasoconstriction only temp as increased metabolic activity from HR releases vasoactive substances so get vasodilation. Also get in brain as metabolic factors dominate