Page 541 - Atlas of Histology with Functional Correlations

5. The immunoglobulins found in the saliva are produced by:

A. serous acini in salivary glands.

B. mucous acini in salivary glands.

C. striated ducts.

D. plasma cells in the salivary acini and striated ducts.

E. plasma cells in the connective tissue around salivary glands.

ANSWERS

1. Correct Answer: A. Secreting bicarbonate ions and absorbing chloride. The
exchanges of these ions form a hypotonic saliva for the oral cavity.

2. Correct Answer: B. Absorbing sodium and adding potassium and

bicarbonate ions. This action buffers and produces a hypotonic saliva.

3. Correct Answer: A. Breaking down starch in the oral cavity. Although
starch is in the oral cavity, amylase breaks it down before it is swallowed.

4. Correct Answer: D. To contract secretory acini to expel secretions. The

contractile myoepithelial cells surround the secretory acini and, by
contracting, cause expulsion of the secretory products into the excretory
ducts.

5. Correct Answer: E. Plasma cells in the connective tissue around salivary
glands. The proteins secreted by acinar cells bind to and transport

immunoglobulins from plasma cells into saliva.

ADDITIONAL HISTOLOGIC IMAGES

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