Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?

Explanation

### Step-by-Step Solution:

1. **Understanding Synapse**: A synapse is a junction between two neurons where the transmission of signals occurs. It consists of the axonal end of one neuron and the dendritic end of another neuron.

2. **Direction of Signal Flow**: The flow of signals in a synapse is unidirectional, meaning it goes from the axonal end of one neuron to the dendritic end of another neuron. This is crucial for proper communication between neurons.

3. **Role of Neurotransmitters**: At the axonal end of the first neuron, neurotransmitters (chemical substances) are released into the synaptic cleft (the gap between neurons). These neurotransmitters are responsible for transmitting the signal to the next neuron.

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