Chapter 18 of my class Flashcards
(20 cards)
place in order from superficial to deep the three tunics of a typical blood vessel.
tunica externa, tunica media, tunica intima
Which blood vessel tunic is innervated by nerves from the sympathetic nervous system?
tunica media
which of the following arteries has the smallest diameter?
metarteriole
which vessels typically carry blood away from the heart?
arteries
what type of vessel is built to handle the highest pressure of any vessel in the cardiovascular system?
elastic artery
the closure of a precapillary sphincter prevents blood to flow to tissues from:
arterioles
which is true of veins?
veins have thinner walls than areteries
which vessels serve as the blood reservoirs of the body?
veins
what connects vessels through vascular through vascular anastomoses?
collaterals
The outward force that blood exerts on the walls of blood vessels is:
blood pressure
select the correct relationship between peripheral resistance and blood pressure.
as peripheral resistance increases blood pressure increases
peripheral resistance includes all of the following except
blood type
what will decrease peripheral resistance?
increase in vessel radius
which circuit has the greatest peripheral resistance?
systemic circuit
what two factors determine the pressure gradient that drives circulation?
cardiac output and peripheral resistance
during exercise, our vessels constrict and vessel radius decreases. What impact does a decreased vessel radius have on blood flow?
blood flow increases
which blood vessels experience the sharpest decrease in blood pressure?
systemic arterioles
which blood vessels handle the highest blood pressures
systemic arteries
what two values are needed to calculate mean arterial pressure?
diastolic pressure and systolic pressure
The average pressure in the systemic arteries during the entire cardiac cycle is known as
mean arterial pressure (MAP)
