How is synapse formed ?

Explanation

### Step-by-Step Solution:

1. **Definition of Synapse**: A synapse is defined as the junction between two neurons where nerve impulses are transmitted from one neuron to another.

2. **Components of a Synapse**: The formation of a synapse involves the membranes of three key components:
- Pre-synaptic neuron: The neuron that sends the signal.
- Synaptic cleft: The gap between the two neurons.
- Post-synaptic neuron: The neuron that receives the signal.
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