Drugs that block the function of a neurotransmitter are known as:

Drugs that block the function of a neurotransmitter are known as:

• A. Antagonists
• B. Neuromodulators
• C. Antagonists
• D. Reuptake inhibitors

Answer: (C)

Blocking the action of a neurotransmitter is what antagonists do. These drugs bind to the receptor but don’t activate it, effectively occupying the site so the natural neurotransmitter can’t bind and signal the neuron. Because the receptor isn’t activated, the downstream post-synaptic response is reduced or eliminated. This is the essence of antagonism: it dampens or stops the normal effect of the neurotransmitter. In contrast, reuptake inhibitors don’t block the transmitter’s action at the receptor. They keep more of the neurotransmitter in the synapse by preventing its reabsorption, which enhances signaling rather than blocking it. Neuromodulators are broader in function; they can alter the strength or spread of signals in neural networks and aren’t necessarily acting by simply blocking receptor activity.

Blocking the action of a neurotransmitter is what antagonists do. These drugs bind to the receptor but don’t activate it, effectively occupying the site so the natural neurotransmitter can’t bind and signal the neuron. Because the receptor isn’t activated, the downstream post-synaptic response is reduced or eliminated. This is the essence of antagonism: it dampens or stops the normal effect of the neurotransmitter.

In contrast, reuptake inhibitors don’t block the transmitter’s action at the receptor. They keep more of the neurotransmitter in the synapse by preventing its reabsorption, which enhances signaling rather than blocking it. Neuromodulators are broader in function; they can alter the strength or spread of signals in neural networks and aren’t necessarily acting by simply blocking receptor activity.