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31 terms

A&P II ch 21 blood vessels

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capillaries that have a complete lining are called
continuous capillaries
after blood leaves the capillaries, it enters the
venules
which layer of a blood vessel contains concentric sheets of smooth muscle tissue
tunica media
venae cavae are the largest of what type of vessel
vein
a sample of tissue displays many large flattened spaces lined by fenestrated endothelium. blood moves slowly through these spaces. this tissue sample most likely came from the
liver
exchange between a blood vessel and the cells that surround it can occur only in
capillaries
which kind of vessel is also called a resistance vessel
arteriole
what vessels contain elastic fibers in the walls that are stretched during systole
arteries
what vessels hold the largest percentage of the blood supply
vein
blood moves forward through veins because of all of the following, except
pumping by the smooth muscle in the wall of the vein
which part of the vascular system functions as a blood reservoir and contains over 60% of the body's blood
veins
the main control of peripheral resistance occurs in the
arterioles
the small vessels that capillaries drain into are called
venules
as blood travels from arteries to veins,
pressure drops
blood flow to a tissue will increase if the
arterioles dilate
blood pressure increases with all of the following, except
parasympathetic innervation
the main control of peripheral resistance occurs in the
arteriole
the vascular pressure that declines from roughly 35 mm Hg to about 18 mm Hg is the
capillary hydrostatic pressure
clinically, the term blood pressure usually refers to
arterial pressure
averaged over a few heartbeats, venous return is ____ cardiac output
equal to
if blood pressure doubled, the blood flow through a vessel would be
doubled
each of the following factors would increase peripheral resistance, except
vasodilation
relative to the lumen, which of these vessels has the thickest tunica media
arterioles
the difference between the systolic and diastolic pressures is called the ____ pressure
pulse
the blood colloid osmotic pressure mostly depends on the
concentration of plasma proteins
as blood circulates from arteries into capillaries, the total cross-sectional area of capillaries
increases and causes the blood velocity to decrease
some of the fluid that is forced out of capillaries is returned to the blood by the
lymphatic system
blood colloid osmotic pressure is produced by
large non diffusible proteins in the blood plasma
as blood travels from arteries to veins
pressure decreases
stimulation of the aortic baroreceptors reflexively results in
increased activity by the parasympathetic nervous system
during exercise
-vasodilation occurs at the active skeletal muscles
-venous return increases
-both cardiac output and stroke volume increase
-tissue perfusion to the digestive system decreases