(a) State the mode of action of cocain on human body. Write the scientific name of the source plant it is obtained from.

(a) • Interferes with the transport of neurotransmitter(dopamine) / stimulating action on central nervous system (CNS) / hallucinations / sense of euphoria / increased energy

(b) Drop in academic performance, unexplained absence from school/college, lack of interest in personal hygiene, withdrawal, isolation, depression, fatigue, aggressive and rebellious behaviour, deteriorating relationships with family and friends, loss of interest in hobbies, change in sleeping and eating habits, fluctuations in weight, appetite, stealing/mental stress/financial stress