flow in blood vessels

Question 1

blood pressure

Answer 1

controlled by homeostatic mechanisms that rely on pariforal resistance, that is the resistance offered by blood vessels

Question 2

darcys law

Answer 2

describes flow as pressure difference/resistance of flow

Question 3

flow resistance

Answer 3

largely determined by vascular diameter.

Question 4

poisuelles law

Answer 4

according to this flow is determined and proportional to the fourth power of the radius of a small blood vessel

Question 5

resistanc to flow can be altered by

Answer 5

local tissue factors
innervation
hormones
local wall stress

Question 6

factors controlling flow are…

Answer 6

closely related to metabolism and injury

Question 7

active hyperaemia

Answer 7

when tissues produce more metabolites,
consume more oxygen
produce a lower than normal pH

Question 8

flow autoregulation

Answer 8

occurs locally as substances causing dilatation increase flow and are washed out

Question 9

injury causes

Answer 9

local histamine release swell as other injury chemicals

Question 10

inovation

Answer 10

Sympathetic nerves generally cause vasoconstriction of smooth muscle with notable exceptions when smooth muscle contains more beta-receptors, leading to vasodilatation.
Cholinergic nerves have almost no effect except in gastrointestinal vasculature.

Non cholinergic non-adrenergic nerves release VIP and NOX and are vasodilatory.