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Nicotine acts as a stimulant, because it mimics the effect of (a) testosterone (b) dopamine (c)...

Nicotine acts as a stimulant, because it mimics the effect of

(a) testosterone

(b) dopamine

(c) thyroxine

(d) acetylcholine.

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Answer #1

Nicotine is key substance of tobacco and poduces stimuloatory effects on body. The mechanism of action of nicotine is similar to the neurotransmitter acetylcholine. Nicotine stimulates nervous system and causes increase of heart rate and blood pressure. It stimulates the muscles to relax and also stimulates the secretion of adrenalin or epinephrine from adenal glands for stimulation of nervous system. The stimulatory activity of nicotine is temporary and in high doses the nerve impulses are inhibited by autonomic ganglia and at neuromuuar junction. Therefore, option d is correct..

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