Question

matching
match the term on the left with the proper selection on the right:

1. arteries
2. veins
3. capillaries
4. tunica externa
5. precapillary sphincters
6. superior vena cava
7. aorta

a. smooth muscle cells that guard entrance to capillaries
b. carry blood to the heart
c. carry blood into venules
d. carry blood away from the heart
e. largest vein
f. largest artery
g. outermost layer of arteries and veins

multiple choice
select the best answer.

1. the aorta carries blood out of the:

a. right atrium
b. left atrium
c. right ventricle
d. left ventricle
e. none of the above

1. the superior vena cava returns blood to the:

a. left atrium
b. left ventricle
c. right atrium
d. right ventricle
e. none of the above

1. which one of the following vessels walls are made up entirely of endothelial cells?

a. vein
b. capillary
c. artery
d. venule
e. arteriole

1. the __________ is made up of smooth muscle

a. tunica media
b. tunica adventitia
c. tunica intima
d. endothelium
e. myocardium

1. the __________ function as exchange vessels.

a. venules
b. capillaries
c. arteries
d. arterioles
e. veins

Explanation:

Matching Section:

• Arteries transport blood away from the heart.
• Veins carry blood back to the heart.
• Capillaries drain into venules after exchange.
• Tunica externa is the outermost vessel layer.
• Precapillary sphincters regulate capillary entry.
• Superior vena cava is the largest vein.
• Aorta is the largest artery.

Multiple Choice Section:

1. The aorta exits the left ventricle (main pumping chamber for systemic circulation).
2. Superior vena cava returns deoxygenated blood to the right atrium.
3. Capillaries have only endothelial walls for nutrient/gas exchange.
4. Tunica media is the vessel layer with smooth muscle for contraction.
5. Capillaries are the site of nutrient, gas, and waste exchange between blood and tissues.

Answer:

Matching:

1. Arteries - D. Carry blood away from the heart
2. Veins - B. Carry blood to the heart
3. Capillaries - C. Carry blood into venules
4. Tunica externa - G. Outermost layer of arteries and veins
5. Precapillary sphincters - A. Smooth muscle cells that guard entrance to capillaries
6. Superior vena cava - E. Largest vein
7. Aorta - F. Largest artery

Multiple Choice:

1. D. Left ventricle
2. C. Right atrium
3. B. Capillary
4. A. Tunica media
5. B. Capillaries