In the epiphyseal plate of a long bone, cartilage grows:
A) in a circular fashion.
B) by pushing the epiphysis away from the diaphysis.
C) from the edges inward.
D) by pulling the diaphysis toward the epiphysis.
Answer: B
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Action potentials are related to impulses conducted along an axon in that
A) active transport of Na+ and K+ are required for impulse conduction but not for an action potential. B) propagation of a series of action potentials along a nerve cell fiber constitutes an impulse. C) impulses are stronger responses than are action potentials. D) many impulses are required to cause one action potential.
When first focusing a microscope on a specimen, which objective lens should always be used first?
A. It does not matter; any objective lens can be used first. B. Scanning C. Low-power D. Oil immersion E. High-power
You go see a scary movie. By the end of the movie your heart is racing thanks to high levels of epinephrine in your bloodstream. You ate nothing during the movie, but your blood glucose level is likely
A. low due to the action of cortisol on blood glucose regulation. B. low due to an overall lack of nutrients. C. elevated due to the action of epinephrine on blood glucose regulation. D. elevated due to healthy post-absorptive state mechanisms. E. elevated due to the pasta meal consumed at home before the movie.
Which pressure remains negative throughout the respiratory cycle?
A) intrapulmonary B) intrapleural C) intra-alveolar D) atmospheric E) intrapulmonary and intra-alveolar