Rickets, a disease characterized by overproduction and deficient calcification of osteoid tissue, is caused by a lack of sufficient
A. Thyroid hormone.
B. Calcitonin.
C. Vitamin A.
D. Vitamin D.
E. Vitamin C.
Answer: D
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What step occurs first in the embryonic development of most bones?
a. Appositional growth occurs. b. A bony collar forms. c. The medullary cavity is formed. d. Cartilage is digested away.
Which capillaries branch from efferent arterioles of cortical nephrons and which branch from 71) efferent arterioles of juxtamedullary nephrons?
A) arcuate and peritubular, respectively B) peritubular and vasa recta, respectively C) cortical and juxtamedullary, respectively D) vasa recta and interlobular, respectively E) interlobar and interlobular, respectively
Which muscle acts as an antagonist to trapezius?
A. Erector spinae B. Splenius capitis C. Rectus abdominis D. Temporalis E. Sternocleidomastoid
The total body water of an average adult is approximately:
A. 45% B. 60% C. 75% D. 80%