Which of the following is correct about the electrical synapse

Options

A. `{:("Membranes of pre-and post-synaptic neurons","Requirement of neurotransmitter"),("Are in very close proximity","yes"):}`
B. `{:("Membranes of pre-and post-synaptic neurons","Requirement of neurotransmitter"),("Are in very close proximity","No"):}`
C. `{:("Membranes of pre-and post-synaptic neurons","Requirement of neurotransmitter"),("Are not in very close proximity","yes"):}`
D. `{:("Membranes of pre-and post-synaptic neurons","Requirement of neurotransmitter"),("Are not in very close proximity","No"):}`

Answer

To solve the question regarding electrical synapses, we will analyze the options provided and understand the characteristics of electrical synapses.

### Step-by-Step Solution:

1. **Understanding Electrical Synapses**:
- Electrical synapses allow direct electrical communication between neurons. They are formed by gap junctions that connect the membranes of pre and post-synaptic neurons.

2. **Characteristics of Electrical Synapses**:
- **Close Proximity**: The membranes of the pre and post-synaptic neurons are in very close proximity.
- **No Neurotransmitter Required**: Unlike chemical synapses, electrical synapses do not require neurotransmitters for signal transmission. Instead, ions and small molecules can pass directly through gap junctions.

3. **Analyzing the Options**:
- **Option 1**: Membranes of pre and post-synaptic neurons are in very close proximity and there is a requirement of neurotransmitter.
- This is incorrect because, while the membranes are in close proximity, electrical synapses do not require neurotransmitters.

- **Option 2**: Membranes of pre and post-synaptic neurons are in very close proximity and there is no requirement of neurotransmitter.
- This is correct. The membranes are indeed close, and no neurotransmitter is needed.

- **Option 3**: Membranes of pre and post-synaptic neurons are not in very close proximity and there is a requirement of neurotransmitter.
- This describes a chemical synapse, which is incorrect for electrical synapses.

- **Option 4**: Membranes of pre and post-synaptic neurons are not in very close proximity and there is no requirement of neurotransmitter.
- This is also incorrect as it contradicts the characteristic of electrical synapses being in close proximity.

4. **Conclusion**:
- The correct answer is **Option 2**: Membranes of pre and post-synaptic neurons are in very close proximity and there is no requirement of neurotransmitter.