principals of blood flow Flashcards
what is the dichrotic notch
it is a small dip caused by the backfilling of the aortic valve as it closes
(seen in the pressure vs time graph)
what stage in blood flow does this statement describe:
“steady, laminar flow in rigid vessels
static driving pressure”
stage 1
what stage in blood flow does this statement describe:
“microcirculation and diffusion”
stage 4
what stage in blood flow does this statement describe:
“elastic vessel walls and pulsatile pressure”
stage 3
what stage in blood flow does this statement describe:
“high reynold’s number flow turbulence
dynamic pressure”
stage 2
describe the flow in series
constant flow
Q=Q1=Q2…
describe the blood flow in a parallel circuit
the volume flows are additive
Q= Q1+Q2…
what is the units for blood flow?
L/min
does this statement apply to series or parallel circuits?
“Blood flow is the same across any TOTAL cross sectional area of a system”
this statement applies to BOTH circuits
took me awhile to get it, page 157 in the notes can help
list 2 examples of blood circulation in our body that are in series
- the splenic and mesenteric vascular beds are in series with hepatic circulation
- renal glomerular and tubular circulation
how is flow distribution controlled?
by the adjustment of resistances (precapillary sphincters and arterioles) located prior to the capillary beds
where are the 3 biggest changes in tissue supply noted regarding blood flow during exercise?
- skin
- muscles
- heart
define velocity
rate of displacement of a PARTICLE of fluid with respect to time
define flow
give the equation for flow
rate of displacement of VOLUME of fluid with respect to time
Q= A x v
for an incompressible fluid in a closed system of rigid tubes what value stays constant; flow (Q), velocity (v), cross sectional area (A)?
flow! (Q)
