Answer:
The correct answer will be- agonists
Explanation:
Neurotransmitters are the chemical messengers present at the synaptic junctions between the neurons. These chemical messengers help transmit the electrical signals to post neurons like acetylcholine, serotonin.
The drug which mimics or is similar to a particular neurotransmitter is known as the agonist. The agonists like opiate drugs mimic the neurotransmitters which produce a temporary sensation of arousal or pleasure by blocking the reuptake of the neurotransmitters.
Thus, agonists are the correct answer.
