_____ is a CNS stimulant as it interferes with the transport of the neuro- transmitter _____

Options

A. Cocaine, acetylcoline
B. Barbiturate, glutamate
C. Cocaine, dopamine
D. Barbiturate, glycine

Answer

**Step-by-Step Solution:**

1. **Identify the CNS Stimulant**: The question asks for a central nervous system (CNS) stimulant. Among the options provided, cocaine is known to be a CNS stimulant.

2. **Understand the Mechanism**: Cocaine works by interfering with the transport of neurotransmitters in the brain. Specifically, it affects the reuptake of certain neurotransmitters, leading to increased levels in the synaptic cleft.

3. **Identify the Neurotransmitter**: The specific neurotransmitter that cocaine interferes with is dopamine. Dopamine is crucial for transmitting signals between neurons.

4. **Explain the Interaction**: Cocaine blocks the transporter proteins responsible for the reuptake of dopamine. This blockage results in an accumulation of dopamine in the synaptic gap, enhancing its effects and leading to increased CNS activity.

5. **Conclude the Answer**: Therefore, the correct answer to the question is: "Cocaine is a CNS stimulant as it interferes with the transport of the neurotransmitter dopamine."

---