Q.Marijuana is extracted from a) Dried leaves and flowers of hemp plant. b) Ergot fungus c) Roots of hemp plant d) Cocoa plant

Adolescence (roughly age 12–19) begins with the physical/sexual changes of puberty and is also a period of significant psychological and social change, making adolescents vulnerable to peer pressure that can push them toward experimenting with drugs and alcohol. Drug abuse is defined as taking a drug for a purpose other than its normal clinical use, in an amount/frequency that impairs physical, physiological or psychological function. Alcohol itself is a psychoactive depressant that slows nervous-system activity and affects mood and behaviour.

Commonly abused drug categories include: opioids (bind CNS/gut opioid receptors; heroin is diacetyl morphine, made by acetylating morphine from the opium poppy, and is a widely abused depressant/painkiller); cannabinoids (from Cannabis sativa — marijuana, ganja, hashish, charas — which interfere with dopamine transport and stimulate the CNS); coca alkaloids (cocaine, from Erythroxylum coca leaves, causing hallucinations and paranoia); and hallucinogens (Atropa belladonna, Datura, and synthetic LSD, which distort perception). Barbiturates, amphetamines and tranquilizers are also commonly abused, despite being legitimate medicines for depression/insomnia when used clinically. These are organized into five effect-based groups: stimulants (accelerate brain activity — amphetamines, cocaine, nicotine, tobacco), d …