Alcohol consumption affects

Do you think that friends can influence one to take alcohol or drugs? If yes,how may one protect himself or herself from such an influence?

Provide information about addictive substances (drugs).

Nicotine intake stimulates the $...A...$ to release $...B...$ and $...C...$ into blood circulation. This leads to an increase in $...D...$ and an increase in $...E...$. Here $A$ and $E$ refer to:

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

The chronic use of drugs and alcohol damages: