Which of the following regulates blood flow at the entrance to each true capillary? valves tunica intima lymph nodes tunica externa precapillary sphincter

/in /by

Which of the following regulates blood flow at the entrance to each true capillary?

valves
tunica intima
lymph nodes
tunica externa
precapillary sphincter

 
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The only vessels that provide direct access to nearly every cell in the body are the __________. venules arteries veins capillaries arterioles

/in /by

The only vessels that provide direct access to nearly every cell in the body are the __________.

venules
arteries
veins
capillaries
arterioles

 
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Reduction in the lumen diameter of a blood vessel as the smooth muscle contracts is known as __________. arteriosclerosis atherosclerosis varicose veins vasoconstriction vasodilation

/in /by

Reduction in the lumen diameter of a blood vessel as the smooth muscle contracts is known as __________.

arteriosclerosis
atherosclerosis
varicose veins
vasoconstriction
vasodilation

 
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Any condition in which blood vessels are inadequately filled and blood CANNOT circulate normally is called __________. atherosclerosis arteriosclerosis circulatory shock varicose veins hypertension

/in /by

Any condition in which blood vessels are inadequately filled and blood CANNOT circulate normally is called __________.

atherosclerosis
arteriosclerosis
circulatory shock
varicose veins
hypertension

 
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