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Instructions: For each histology question, pick the one best answer. This histology test bank is also useful for the histology questions on the USMLE (USMLE step 1). Click here for answers and detailed explanations.
1.
At what level of the vascular tree does gas exchange occur?
a. Capillary
b. Arteriole
c. Venule
d. Elastic artery
e. Muscular artery
2.
Which layer in an artery is primarily skeletal muscle?
a. Tunica intima
b. Tunica media
c. Tunica externa
d. All of the above
e. None of the above
3.
Which of the following is NOT a distinguishing feature between larger veins and arteries?
a. Veins have valves whereas arteries do not have valves
b. The tunics in veins are not as clearly delimited as are the tunics in arteries
c. The walls in veins are thinner than the walls in arteries
d. The lumen of a vein is smaller than the lumen of an artery
e. None. All of the above are true
4.
In which structure are things moved across the epithelium via pinocytotic vesicles?
a. Continuous capillaries
b. Fenestrated capillaries
c. Sinusoidal capillaries
d. AV anastomoses
e. Venous sinus
5.
What is a thoroughfare which is a an intermediate between an arteriole and capillary?
a. Metcapillary
b. Metartery
c. Metvenule
d. Metarteriole
e. None of the above
6.
Which layer in an artery contains the endothelium?
a. Tunica intima
b. Tunica media
c. Tunica externa
d. All of the above
e. None of the above
7.
What do you call the simple squamous epithelium that lines the blood vessels?
a. Epithelioid tissue
b. Mesothelium
c. Endothelium
d. Transitional
e. Pseudostratified
8.
In which of the following is a portal system NOT found?
a. Kidney
b. Liver
c. Muscle
d. Brain
e. None of the above is correct; a portal system is found in all of the above
9.
What is the brachial artery?
a. Capillary
b. Arteriole
c. Venule
d. Elastic artery
e. Muscular artery
10.
Which of the following is a distinct structure found specifically in the liver, spleen, and bone marrow?
a. Continuous capillaries
b. Fenestrated capillaries
c. Sinusoidal capillaries
d. AV anastomoses
e. Venous sinus
Click here for answers and detailed explanations.
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