Two physiology questions

[Guest magicpie32]

I am doing some research for the answers of these two phsyiology questions. I am not having much luck. I hope that someone will be able to help me.

 

1. Nicotine stimulates cholinergic receptors of the autonomic nervous system. Based on this information, how would cigarette smoking affect the cardiovascular system?

 

 

 

2. Tom loves to soak in hot tubs and whirlpools. One day he decides to raise the temperature in his hot tub as high as it will go. After a few minutes in the very warm water, he feels faint, passes out, and nearly drowns. Luckily he is saved by an observant bystander. Explain what happened

 

 

 

THANKS