generally
Drugs act on the neurons in the limbic system.
I don't know the answer. Just got it on my health test.
stimulants
The lungs act as the mechanism to exchange oxygen and carbon dioxide. The heart is the main pumping system that helps to move it throughout the body.
The endocrine system
circulatory system act like a water pipe, it allows blood to transport to the body
This is because they are harsher on the body. It takes more to kill off these kinds of diseases so they are more harmful to the body.
nerves act as the messanger of electrical impulses throughout the nervous system(axons,dendrites)
nucleus accumbens
It would increase the pulse, providing it acted upon the cardiac conduction system. There are parasympathetic antagonists which act on other parts of the body, such as the bladder; such drugs would not affect the pulse (theoretically).
The endocrine system is the part of the body that produces hormones which act on the rest of the body. An endocrinologist, therefore, studies that system and the hormones it produces.
Depends on the kind of drug. It will lessen the effectiveness of many drugs by causing them to move through the body more rapidly. If you mean drugs of abuse, the answer is an emphatic "No!" If anything, it will make the effects worse.