Histology Certification Organ Histology 3

Question 1

The tunica media of large elastic arteries such as the aorta is characterized by:

Accepted Answer

Alternating layers of elastic lamellae and smooth muscle

Answer

Dense irregular connective tissue with fibroblasts

Answer

A single internal elastic lamina

Answer

Abundant collagen type I with sparse elastin

Question 2

In the small intestine, which cells secrete defensins and lysozyme to protect the intestinal crypts?

Accepted Answer

Paneth cells

Answer

Goblet cells

Answer

Enteroendocrine cells

Answer

M cells

Question 3

The glomerular podocyte foot processes are interconnected by which specialized junction?

Accepted Answer

Slit diaphragm

Answer

Tight junction (zonula occludens)

Answer

Gap junction (nexus)

Answer

Desmosome

Question 4

Which histological stain is most appropriate for identifying reticular fibers forming the framework of lymph nodes and spleen?

Accepted Answer

Gomori reticulin (silver impregnation)

Answer

Masson's trichrome

Answer

Periodic acid–Schiff (PAS)

Answer

Hematoxylin and eosin

Question 5

The zona pellucida surrounding an oocyte is composed primarily of:

Accepted Answer

Glycoproteins ZP1, ZP2, and ZP3

Answer

Type IV collagen and laminin

Answer

Fibronectin and vitronectin

Answer

Hyaluronic acid and proteoglycans

Question 6

In the testis, which cells form the blood–testis barrier by creating tight junctions between adjacent cells?

Accepted Answer

Sertoli cells

Answer

Leydig cells

Answer

Spermatogonia

Answer

Myoid cells

Question 7

The portal triad of the liver classically contains which three structures?

Accepted Answer

Portal vein branch, hepatic artery branch, bile ductule

Answer

Central vein, sinusoid, space of Disse

Answer

Hepatic vein, lymphatic vessel, nerve

Answer

Kupffer cell, Ito cell, hepatocyte