Aspirin and ibuprofen both _____
A) inhibit the synthesis of prostaglandins
B) inhibit the release of nitric oxide, a potent vasodilator
C) activate the paracrine signaling pathways that form blood clots
D) stimulate vasoconstriction in the kidneys
A
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In this diagram of a neuron, which item, A, B, C, or D, is an axon terminal?
1.A
2.B
3.C
4.D
National parks are an important part of our heritage,
A. and they remain pristine and undisturbed because of their park status. B. but they lack any protection from mining, logging, and grazing. C. but they are endangered by overcrowding, pollution, and in some places, mining. D. that unfortunately exist only in remote inaccessible areas. E. but they are endangered by overcrowding.
The distribution of living organisms would be
increased by a. continental drift. b. the formation of Pangea. c. the sea-floor spreading. d. the movement of Gondwana. e. all but “the formation of Pangea.”
The myelin sheath
a. is formed by the Schwann cell. b. speeds up the transmission of impulses. c. does not surround all nerves. d. extends from node to node. e. all of these