Which of the following cranial nerves functions in mastication and sensory for the face and mouth?

 # Which of the following cranial nerves functions in mastication and sensory for the face and mouth? 

a. Trigeminal. 

b. Facial. 

c. Glossopharyngeal. 

d. Hypoglossal.

The correct answer is A. Trigeminal.

The trigeminal nerve functions in mastication and sensory for the face and mouth. The facial nerve functions in muscles of facial expression, controlling secretion of tears and saliva, and taste (anterior two thirds of the tongue).

The glossopharyngeal nerve functions in taste (posterior one third of tongue), salivary  secretion, carotid blood pressure, sensory posterior one third of tongue, and stylopharyngeus muscle. The hypoglossal nerve provides motor function to tongue muscles (except palatoglossal).

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Septal hematoma is treated with:

# Septal hematoma is treated with:

A. Incision/Drainage

B. Antibiotics

C. Nasal packing

D. Decongestants

 

The correct answer is A. Incision/Drainage.

Treatment of septal hematoma is performed via small incisions through the mucoperichondrium to evacuate the blood. After the drainage the nose is packed or quilting stitches are put in. Silicone stents can also be used to prevent re-accumulation of the hematoma. 

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Cells accumulated during allergic reactions

 # Which type of cell accumulates wherever allergic reactions take place (e.g., asthma)? 

a. Neutrophils. 

b. Monocytes. 

c. Eosinophils. 

d. Basophils.

The correct answer is C. Eosinophils.

Neutrophils can squeeze through the capillary walls and into infected tissue where they  kill invaders (e.g., bacteria) and engulf the remnants by phagocytosis. Monocytes leave the blood and become macrophages. Eosinophils are a type of white blood cell that contain granules and take up the  red dye eosin. They accumulate wherever allergic reactions (e.g., asthma) occur. Their natural role is in the defense of parasites and other microorganisms. Basophils are a type of white blood cell filled with blue-staining granules of chemicals including histamine, serotonin, bradykinin, heparin, and cytokines such as prostaglandins and leukotrienes. In addition, basophils can digest microorganisms and are responsible for allergy symptoms.

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Hemidesmosomes connect which of the following structures:

 # Hemidesmosomes connect which of the following structures? 

a. Connective tissue and basement membrane. 

b. Basement membrane and basal cell layer. 

c. Connective tissue and basal cell layer. 

d. Basal cells.

The correct answer is B. Connective tissue and basal cell layer. 

Anchoring fibrils connect the connective tissue to the basement membrane. Hemidesmosomes connect the basement membrane to the basal cell layer. The connective tissue and basal cell layer do not connect. Hemidesmosomes connect the basement membrane to the basal cell layer.

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