phase 3 Flashcards
Which type of vessel transports blood under high pressure, with blood flowing at high velocity?
arteries
Which type of vessel is a conduit for capillaries and can either constrict or dilate?
arterioles
Which type of vessel exchanges fluid, nutrients, electrolytes, and hormones?
capillaries
Which type of vessel is permeable to water and other substances?
capillaries
Which type of vessel collects blood from capillaries?
venules
Which type of vessel is a conduit for transportation of blood back to the heart?
veins
Which type of vessel is a major reservoir for extra blood?
veins
Which type of vessel contains lots of smooth muscle to control blood flow into capillaries?
arterioles
What is the equation for blood flow velocity (V)?
V=F/A
V: velocity
F(Q): blood flow
A: cross sectional area
What type of relationship does blood flow velocity have with the total cross sectional area?
inverse relationship
-as A increases, F decreases
-A: cross sectional area
F: blood flow
At what point is the total cross sectional area the highest?
when the blood reaches the capillaries
As arteries branch, the total cross sectional area increases and speeds up blood flow velocity
false
-A increases, V slows down
-A: cross sectional area
-V: blood flow velocity
When veins merge, the velocity of blood flow increases and the total cross sectional area decreases
true
Right atrial pressure is the highest in the body
false
-lowest
What has the biggest influence on blood flow?
vessel radius
The difference between two ends of a vessel
pressure gradient
Impediment to blood flow through a vessel
vascular resistance
What is the equation for Ohm’s law?
-F=change in pressure/R
-change in pressure=F*R
-R=change in pressure/F
What is the equation for Poiseuille’s law?
(pi*(change in pressure)r^4/8nl
What is the equation for cardiac output?
CO=SV*HR
What are the causes of turbulent blood flow (eddy currents)?
-high velocities
-sharp turns in circulation
-rough surfaces in circulation
-rapid narrowing of vessels
What is the equation for Reynold’s number?
Re=vdp/n
-v=velocity
-d=diameter
-p=density
-n=viscosity
What is the equation for MAP?
MAP=(SBP+DVP+DVP)/3
What is the TPR in the systemic circuit?
change in P=100mmHg
