Blood Vessel Practice Quiz – Flashcards
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1. venules
2. arterioles
3. capillaries
4. elastic arteries
5. medium veins
6. large veins
7. muscular arteries
answer
4, 7, 2, 3, 1, 5, 6
question
Blood moves forward through veins because of all of the following, except:
a. the pressure in the veins is lower than the pressure in the arteries
b. pumping by the smooth muscle in the wall of the vein
c. the respiratory pump
d. valves in the veins preventing the backward flow of blood
e. muscular compression
answer
b
question
Total peripheral resistance is related to all of the following, EXCEPT the
a. length of a blood vessel
b. osmolarity of interstitial fluids
c. flow characteristics
d. blood viscosity
e. blood vessel diameter
answer
b
question
An important artery that supplies blood to the brain is the _____ artery.
a. internal carotid
b. external carotid
c. mental
d. azygos
e. maxillary
answer
a
question
Blood from the brain returns to the heart through the ______ vein.
a. vertebral
b. azygos
c. innominate
d. internal jugular
e. external jugular
answer
d
question
The smallest arterial branches are called the
a. precapillary arterioles
b. arterioles
c. capillaries
d. venules
e. veins
answer
a
question
Which of the following layers of a vessel contains collagen fibers with scattered bands of elastic fibers?
a. tunica intima
b. external elastic membrane
c. tunica media
d. internal elastic membrane
e. tunica externa
answer
e
question
These vessels hold the largest percentage of the blood supply.
a. artery
b. arteriole
c. capillary
d. venule
e. vein
answer
e
question
When will the blood pressure be greater?
a. when the peripheral vessels dilate
b. when the peripheral vessels constrict
c. neither is greater
answer
b
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How are blood flow, blood pressure, and resistance related to each other?
answer
blood flow is directly proportional to the change in pressure. blood flow is inversely related to resistance, so as resistance goes up, blood flow goes down.
question
What are baroreceptors and how do they work?
answer
Baroreceptors are receptors that are sensitive to change in blood pressure. They are located in the aortic arch and carotid sinuses. When blood pressure changes, baroreceptors are activated, and the cardioaccelatory center is stimulated. Then, if the blood pressure was low, the heart rate will increase and blood vessels will constrict which will cause the blood pressure to go back to normal. If the blood pressure was high, the heart rate will decrease and blood vessels will dilate which will cause the blood pressure to go back to normal.
