Exposure to ultraviolet light darkens skin by stimulating synthesis of
A. hemoglobin.
B. cyanin.
C. carotene.
D. melanin.
Answer: D
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Canaliculi are
A) also known as Volkmann's channels. B) the same as Haversian canals. C) narrow passageways in the matrix connecting lacunae to blood supply. D) layers of bony matrix laid down in rings. E) have both a fibrous outer layer and a cellular inner layer.
Insulin causes blood plasma levels of potassium to ________ by _______ activity of the Na+/K+ pumps
A. increase; stimulating B. increase; inhibiting C. decrease; stimulating D. decrease; inhibiting
Which of the following vessels would be found in the renal columns?
A. Segmental artery B. Cortical radiate artery C. Interlobar artery D. Arcuate artery
mutations that destroy the protective function of tumor suppressor genes can lead to ________________.
Fill in the blank(s) with the appropriate word(s).