PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -Psychoactive drugs can act as agonists or antagonists for a given neurotransmitter system. Agonists are chemicals that mimic a neurotransmitter at the receptor site and, thus, strengthen its effects. An antagonist, on the other hand, blocks or impedes the normal activity of a neurotransmitter at the receptor.

Detailed explanation-2: -An agonist is a drug that activates certain receptors in the brain. Full agonist opioids activate the opioid receptors in the brain fully resulting in the full opioid effect. Examples of full agonists are heroin, oxycodone, methadone, hydrocodone, morphine, opium and others.

Detailed explanation-3: -Agonists are drugs that increase the activity of particular neurotransmitters. They might act by promoting the synthesis of the neurotransmitters, reducing their reuptake from synapses, or mimicking their action by binding to receptors for the neurotransmitters.

Detailed explanation-4: -Some psychoactive drugs are agonists, which mimic the operation of a neurotransmitter; some are antagonists, which block the action of a neurotransmitter; and some work by blocking the reuptake of neurotransmitters at the synapse.

Detailed explanation-5: -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.