A serous demilune is defined as a(n):
a. A collection of secretory acini that drain into a single duct
b. An association of secretory vesicles at the apical surface of an epithelial cell
c. A bright-staining segment of a basal lamina beneath glandular epithelial cells
d. A collection of serous cells adjacent to mucus cells of a salivary gland
e. Simple cuboidal cells that constitute the duct portions of salivary glands
ANS: D
Swelling of mucus cells within a salivary gland during fixation of the tissue tends to compress adjacent serous cells into a half-moon shaped "cap" at the end of a mixed secretory acinus. See 2-16.
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