The instrument that produces a bright image of the specimen against a dark background is called a (n) ________ microscope.
A. bright-field
B. electron
C. phase-contrast
D. dark-field
Answer: D
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Dopamine derived from the hypothalamus is the prominent hormone controlling pituitary prolactin secretion. Dopamine inhibits prolactin secretion. What do you predict would happen if the pituitary were removed from the base of the brain and transplanted to some distant place in the body (for instance on top of the kidney), such that dopamine could no longer regulate prolactin secretion? You can assume that the transplanted pituitary will be exposed to a ready supply of blood vessels.
A. Dopamine secretion would increase. B. Dopamine secretion would decrease. C. Prolactin secretion would decrease. D. Prolactin secretion would increase. E. Both dopamine and prolactin secretion would decrease.
A(n) ____________________ between chromosome 9 and chromosome 22 in chronic myelogenous leukemia results
in a Philadelphia chromosome. Fill in the blank(s) with the appropriate word(s).
In terms of global gene regulation, which of the following molecules is most similar to c-di-GMP and cAMP?
A. rRNA B. ATP C. ppGpp D. EnvZ
The hammer, anvil, and stirrup are located in the
A) inner ear. B) outer ear. C) middle ear. D) auditory canal. E) cochlea.