Lecture 16, Blood Flashcards
1
Q
flow rule
A
flow=pressure/resistance
2
Q
factors affecting resistance
A
vessel radius (affects most)
vessel length
blood viscosity
3
Q
rule about radius
A
4th power effect
changing vessel radius will change flow by a 4th power
4
Q
blood flow equation
A
blood flow=
blood pressure x radius ^4/ vessel length x fluid viscosity
5
Q
resistance can be regulated through
A
systemic control
local control
6
Q
systemic controls
A
control arterioles from a distance
7
Q
arterioles
A
small arteries that can change radius
used for most regulation of blood flow
8
Q
arteriole regulation
A
either
vasodilation
vasoconstriction
9
Q
how can arteriole radius be controlled
A
sympathetic nervous system
endocrine system
