PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body. This allows the drugs to attach onto and activate the neurons.

Detailed explanation-2: -Psychoactive drugs generally produce their effects by affecting brain chemistry. Generally, they act either as agonists-which enhance the activity of particular neurotransmitters-or as antagonists, which decrease the activity of particular neurotransmitters.

Detailed explanation-3: -Mechanisms of Action Psychoactive drugs generally produce their effects by affecting brain chemistry, which in turn may cause changes in a person’s mood, thinking, perception, and/or behavior. Each drug tends to have a specific action on one or more neurotransmitters or neurotransmitter receptors in the brain.

Detailed explanation-4: -Cocaine is an excitatory psychoactive drug. It stimulates transmission at synapses in the brain that use dopamine as a neurotransmitter. Cocaine binds to membrane proteins that pump dopamine back into the presynaptic neuron.