Cocaine interferes with the transport of the neurotransmitter .........

Nicotine is an alkaloid that enters the body through smoking. How many of the following characteristics are associated with its effects?
$(i)$ Increases blood pressure
(ii) Decreases respiratory rate
(iii) Causes cancer of the lungs,throat,and bladder
(iv) Induces allergies
$(v)$ Can cause emphysema
(vi) Decreases the level of $O_2$ in the blood

Assertion: Heroin,commonly called smack,is chemically diacetylmorphine.
Reason: This is obtained from the acetylation of morphine.

Hallucinogens:

The drugs used by weight-conscious people to reduce appetite and increase alertness are

From which part is opium obtained?