Appositional growth deposits a new layer of bone tissue
A. in the epiphyseal plate of long bones.
B. on the surface of the bone.
C. on spongy bone, but not compact bone.
D. in the secondary ossification center of the epiphyses.
E. in interstitial areas.
Answer: B
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Blood flow is affected by
a. pressure differences. b. the viscosity of the blood. c. the amount of friction in the blood vessels. d. the length and diameter of the blood vessels. e. all of these answers.
Which of the following is the neurotransmitter released from presynaptic terminals of motor neurons?
A. calcium B. acetylcholine C. ATP D. acetylcholinesterase
The central nervous system ischemic response
A. is triggered by an increase in blood flow to the vasomotor center. B. plays an important role in controlling blood pressure under emergency conditions. C. is stimulated by a rise in oxygen. D. is inhibited by a rise in the level of hydrogen ions. E. plays an important role in regulating blood pressure under normal conditions.
The portion of the brain that regulates body temperature is the
A. cerebral cortex. B. hypothalamus. C. medulla oblongata. D. pons. E. hypophysis.