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Smoking, the inhalation of nicotine more precisely, activates the autonomic nervous system and the sympathetic fibres, mimicking the effects of a chemical neurotransmitter acetylcholine that causes postsynaptic excitatory response on B1 adrenoreceptors in the heart, increasing the force and frequency of cardiac myocyte contraction.

And..

The above is a reason to quit...

I feel so much better after 2 weeks, as the above is not happening.

And there are many other things which increase a person's pulse rate, like exercising, being pregnant, worrying and having sex!

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13y ago

What else can I help you with?