All statements about electrical synapses are correct except

Options

A. The membranes of pre-and post synaptic neurons are in very close proximity
B. Transmission of impulse across this synapse is very similar to impulse conduction along a single axon
C. Impulse transmission is always faster than that across a chemical synapse
D. Electrical synapses are very common in our body

Answer

To solve the question regarding electrical synapses and identify the incorrect statement, we can follow these steps:

### Step 1: Understand Electrical Synapses
Electrical synapses are specialized junctions that allow direct electrical communication between neurons. They are formed by gap junctions, which connect the cytoplasm of two adjacent neurons.

**Hint:** Remember that electrical synapses allow direct transmission of electrical signals, unlike chemical synapses which use neurotransmitters.

### Step 2: Analyze the First Statement
The first statement mentions that the membranes of pre-synaptic and post-synaptic neurons are in very close proximity. This is true for electrical synapses, as the gap junctions allow for direct electrical coupling.

**Hint:** Consider how the structure of electrical synapses differs from chemical synapses.

### Step 3: Analyze the Second Statement
The second statement discusses the speed of impulse transmission across electrical synapses compared to chemical synapses. It states that the transmission of impulses is very similar to impulse conduction along a single axon and is faster than across chemical synapses. This is also true, as electrical synapses allow for faster transmission due to the direct flow of ions.

**Hint:** Think about the mechanisms of signal transmission in both types of synapses.

### Step 4: Analyze the Third Statement
The third statement claims that electrical synapses are very common in our body. This statement is incorrect. While electrical synapses do exist, they are not as prevalent as chemical synapses in the human nervous system.

**Hint:** Reflect on the prevalence of different types of synapses in the nervous system and their functional roles.

### Conclusion
After analyzing all the statements, we conclude that the incorrect statement is that "Electrical synapses are very common in our body."

### Final Answer
The incorrect statement about electrical synapses is: "Electrical synapses are very common in our body."