Which of the statement is false regarding synapse.

Options

A. Synapse is formed by 2 membrane first presynaptic membrane of synaptic knob & second post synaptic membrane of dendrite.
B. Synaptic membrane always be seprated by a gap , called synaptic cleft.
C. Electricle synapse in very similar to impulse conduction along a single axon.
D. In chemical synapse, neurotransmitter is released and either excitatory or inhibitory potential is genereted on post synaptic membrane

Answer

To determine which statement is false regarding synapses, let's analyze each statement step by step.

### Step 1: Understand the Structure of a Synapse
A synapse is the junction between two neurons where the transmission of nerve impulses occurs. It consists of:
- **Presynaptic membrane**: This is the membrane of the neuron that sends the signal.
- **Postsynaptic membrane**: This is the membrane of the neuron that receives the signal.

### Step 2: Evaluate the Statements
1. **Statement 1**: "Synapse is formed by the two membranes: the presynaptic membrane of the synaptic lobe and the postsynaptic membrane of the dendrite."
- This statement is **true**. The synapse indeed consists of these two membranes.

2. **Statement 2**: "Synaptic membrane always be separated by a gap called synaptic cleft."
- This statement is **false**. While synapses typically have a synaptic cleft, the phrasing "always be separated" can be misleading. In some types of synapses, such as electrical synapses, the membranes are not separated by a cleft.

3. **Statement 3**: "Electrical synapse is very similar to the impulse conduction along a single axon."
- This statement is **true**. Electrical synapses allow direct electrical communication between neurons, similar to how impulses travel along an axon.

4. **Statement 4**: "In chemical synapse, neurotransmitter is released and either excitatory or inhibitory potential is generated on the postsynaptic membrane."
- This statement is **true**. In chemical synapses, neurotransmitters like acetylcholine are released, which can lead to excitatory or inhibitory responses in the postsynaptic neuron.

### Step 3: Identify the False Statement
Based on the evaluation, the false statement regarding synapses is **Statement 2**: "Synaptic membrane always be separated by a gap called synaptic cleft."

### Final Answer
The false statement regarding synapse is: **"Synaptic membrane always be separated by a gap called synaptic cleft."**

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