What is the secondary stimulus of the peripheral chemoreceptors?
A. decreased H+ level
B. increased PaCO2
C. increased H+ level
D. decreased PaCO2
Answer: C
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Fracture of a bone's growth plate is:
a. unique to childhood. b. unique to adulthood. c. usually heal without permanent deformity. d. both a and c.
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What percentage of the pulmonary vascular bed must be occluded by emboli before pulmonary hypertension occurs?
a. 25% b. 33% c. 50% d. 75%
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