Cocaine's euphoric effect is achieved by which phenomenon?

Cocaine's euphoric effect is achieved by which phenomenon?

• A. Blocking Monoamine Reuptake
• B. A Build Up of Neurotransmitters
• C. Increased GABA Synthesis
• D. Depletion of Monoamines

Answer: (B)

Cocaine produces euphoria mainly because it causes a rapid buildup of monoamines in the synaptic cleft, especially dopamine, in the brain’s reward circuits. By blocking the transporters that normally clear dopamine, serotonin, and norepinephrine from the synapse, these chemicals linger longer and more intensely stimulate postsynaptic receptors. That prolonged signaling in the mesolimbic pathway is what drives the strong subjective feeling of pleasure and reinforcement. Other options don’t fit as well. Increasing GABA synthesis would tend to dampen neural activity rather than create a rush of pleasure. Depletion of monoamines would lower mood, not produce euphoria. While blocking monoamine reuptake is the mechanism that leads to the buildup, the best description of the euphoric effect itself is the actual buildup of neurotransmitters in the synapse that sustains receptor activation.

Cocaine produces euphoria mainly because it causes a rapid buildup of monoamines in the synaptic cleft, especially dopamine, in the brain’s reward circuits. By blocking the transporters that normally clear dopamine, serotonin, and norepinephrine from the synapse, these chemicals linger longer and more intensely stimulate postsynaptic receptors. That prolonged signaling in the mesolimbic pathway is what drives the strong subjective feeling of pleasure and reinforcement.

Other options don’t fit as well. Increasing GABA synthesis would tend to dampen neural activity rather than create a rush of pleasure. Depletion of monoamines would lower mood, not produce euphoria. While blocking monoamine reuptake is the mechanism that leads to the buildup, the best description of the euphoric effect itself is the actual buildup of neurotransmitters in the synapse that sustains receptor activation.