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___________ inhibits norepinephrine reuptake thereby it induces vasoconstriction.

A. Nicotine
B. Cocaine
C. Norepinephrine
D. Muscarine

User Radin Reth
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Final answer:

Cocaine inhibits norepinephrine reuptake and causes vasoconstriction, acting as a stimulant on the sympathetic nervous system. The correct answer is B.

Step-by-step explanation:

The substance that inhibits norepinephrine reuptake and therefore induces vasoconstriction is B. Cocaine. Cocaine acts as a stimulant, not only by preventing reuptake of dopamine but also by affecting norepinephrine reuptake at synapses, thus enhancing sympathetic system functions such as vasoconstriction. Comparatively, nicotine has a more mixed effect on the autonomic system by binding to nicotinic receptors, and while norepinephrine itself is a neurotransmitter responsible for vasoconstriction, it is not involved in the reuptake process. Muscarine acts on muscarinic receptors and is more commonly associated with the parasympathetic system and does not inhibit norepinephrine reuptake.

User Yes Barry
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