Which one of the following do not mediate nerve activity?

Options

A. Dopamine
B. Aflatoxin
C. Norepinephrine
D. Acetyl choline

Answer

To determine which of the following options does not mediate nerve activity, we need to analyze the given options: dopamine, aflatoxin, norepinephrine, and acetylcholine.

### Step-by-Step Solution:

1. **Understand Nerve Activity**:
- Nerve activity refers to the conduction of nerve impulses, which is primarily mediated by neurotransmitters.

2. **Identify the Options**:
- The options provided are:
- Dopamine
- Aflatoxin
- Norepinephrine
- Acetylcholine

3. **Analyze Each Option**:
- **Dopamine**: This is a neurotransmitter that plays a key role in transmitting signals in the brain and is involved in many functions including movement and reward.
- **Aflatoxin**: This is a toxin produced by certain molds (fungi) and is not involved in nerve activity. It is known for its harmful effects on health, particularly in relation to liver damage and cancer.
- **Norepinephrine**: Also known as noreadrenaline, this is another neurotransmitter that is involved in the body's fight or flight response and mediates nerve activity.
- **Acetylcholine**: This is a well-known neurotransmitter that is crucial for muscle activation and also plays a role in the autonomic nervous system.

4. **Conclusion**:
- Among the options, dopamine, norepinephrine, and acetylcholine are all neurotransmitters that mediate nerve activity. In contrast, aflatoxin is a toxin and does not mediate nerve activity.

5. **Final Answer**:
- Therefore, the option that does not mediate nerve activity is **aflatoxin**.