Which one of the following is not a part of synapse

Options

A. Pre-synaptic membrane
B. Post-synaptic membrane
C. Synaptic vesicles
D. Synaptic celft

Answer

To determine which option is not a part of the synapse, let's analyze the components of a synapse step by step:

### Step 1: Understand the Components of a Synapse
A synapse is a junction between two neurons where communication occurs. The key components of a synapse include:
1. **Pre-synaptic membrane**: This is the membrane of the neuron that sends the signal.
2. **Post-synaptic membrane**: This is the membrane of the neuron that receives the signal.
3. **Synaptic cleft**: This is the small gap between the pre-synaptic and post-synaptic membranes where neurotransmitters are released.

### Step 2: Identify the Role of Synaptic Vesicles
Synaptic vesicles are small structures within the pre-synaptic neuron that contain neurotransmitters. They play a crucial role in the transmission of signals by releasing these neurotransmitters into the synaptic cleft. However, they are not considered a structural part of the synapse itself; rather, they are functional components involved in the signaling process.

### Step 3: Evaluate the Options
Given the components mentioned:
- Pre-synaptic membrane: Part of the synapse
- Post-synaptic membrane: Part of the synapse
- Synaptic cleft: Part of the synapse
- Synaptic vesicles: Not a structural part of the synapse

### Conclusion
Based on the analysis, the component that is **not a part of the synapse** is **synaptic vesicles**.

### Final Answer
**Synaptic vesicles** are not a part of the synapse.

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