Histology Written 2018 MC

All of the following are normal parts of neurons EXCEPT 
 

Melanin granules are the end-products of enzymatic modification of the amino acid 
 

The layer of the GI tract that shows the most variation from region to region in terms of its cell content is the 
 

 Immediately outside the myelin sheath in peripheral nerves is a tissue called the 
 

An action potential is very important the proper function of 
 

Lesions on the oral mucosa known as “cold sores” (herpetic gingivostomatitis) are caused by 
 

Each of the following activities within the eye involves cells/tissues within the ciliary body EXCEPT 
 

Which of the following layers is mainly responsible for the protective functions of the epidermis? 
 

All of the following are usually found in the portal tracts in hepatic tissue EXCEPT 
 

Cells called satellite cells in nervous tissue are located in 
 

Drugs that inhibit the activity of H+ pumps specifically in parietal cells block production of 


Pacinian corpuscles 


A secretory epithelial cell of the GI tract whose product may help regulate the local levels of bacteria is the 
 

The disease of the eye called glaucoma is usually caused initially by a functional defect in 
 

An abundant endocrine cell in gastric glands which stimulates the activity of parietal cells is the 
 

Which of the following statements about astrocytes is NOT true? 


A structure in the small intestine which contains one or more lacteals in its center 

The cells of the epidermis are tightly held together by cell junctions called 
 

In cells of the myelin sheath, the narrow channels of cytoplasm that connect the main bulk of cytoplasm with the narrow zone of cytoplasm near the axon are called 
 

Which of the following GI tract regions differs from the other four in the nature of its outermost layer? 
 

A clear fluid called endolymph is important for an activity necessary for sensory reception in 
 

Sustentacular cells are 


In a H&E stained slide of salivary gland, the well-stained cells of the acini are known to primarily secrete 
 

The meningeal layer that is sponge-like and contains a considerable amount of cerebrospinal fluid is the 
 

The dermal papilla is enriched in capillaries and is composed largely of 
 

Stem cells for enterocytes are located 
 

All of the following statements about motor end plates are true EXCEPT 
 

The feeling of dizziness or vertigo is caused by sensory input to the brain from 
 

All of the following are important functions of hepatocytes EXCEPT 
 

 Cells in the eye called keratocytes are important structural components of the  

The space of Disse in liver tissue is normally filled with 
 

Peristaltic activity of the GI tract is primarily a function of the 
 

The term "Nissl substance" is used by neurocytologists to mean 

The population of cells in the developing CNS that do not become neurons are collectively called 

Most of the substance in the marginal zone (white matter) of the developing spinal cord consists of 

All of the following cells or tissues develop from embryonic neural crest cells EXCEPT

White matter" in the CNS is whitish in appearance due to the abundance and activity of glial cells called 

Spinal bifida is a congenital condition that results from 

 Axons are cell extensions specialized for 

Of the following structures, the most numerous in the CNS are: