A&P II ch 21 blood vessels

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final

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

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