Melatonin is secreted by
a. pancreatic islet cells.
b. the thyroid gland.
c. the pituitary gland.
d. the pineal gland.
e. the kidneys.
D
Biology & Microbiology
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What is the role of the villi?
A. To secrete digestive enzymes into the digestive tract B. To secrete water into the digestive tract C. To absorb small nutrient molecules from the digestive tract D. To move food along the digestive tract
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When an owl catches and kills a mouse for food, the owl is
a) a scavenger b) a predator c) prey d) a parasite
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What will be an ideal response?
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The presence of active motile multi-flagellated trophozoites in vaginal or urethral secretion is indicative of infection with
A. Trichomonas vaginalis. B. Chlamydia trachomatis. C. Giardia intestinalis. D. Acanthamoeba. E. Balantidium coli.
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