What is the correct direction of flow of electrical impulses?

Options

A.
B.
C.
D.

Explanation

**Step-by-Step Solution:**

1. **Understanding Electrical Impulses**: Electrical impulses, also known as nerve impulses, are signals generated in response to stimuli. They are essential for communication within the nervous system.

2. **Direction of Flow**: The flow of electrical impulses in a neuron follows a specific pathway:
- **Dendrites**: The impulse is first received by the dendrites of the neuron. Dendrites are the branched extensions of the neuron that receive signals from other neurons.
- **Cell Body**: After the dendrites, the impulse travels to the cell body (soma) of the neuron. The cell body contains the nucleus and is responsible for maintaining the cell's health.
- **Axon**: From the cell body, the impulse moves along the axon, which is a long, slender projection that conducts electrical impulses away from the cell body.
- **Axonal End**: At the end of the axon, the impulse reaches the axonal terminal, where neurotransmitters are released.
- **Synapse**: The neurotransmitters cross the synapse (the gap between two neurons) to transmit the signal to the dendrites of the next neuron.

3. **Evaluating Options**: When looking at the provided options:
- **Option 1**: Incorrect sequence (axon to cell body to dendrite to axonal end).
- **Option 2**: Incorrect sequence (axon to cell body to dendrite to another dendrite).
- **Option 3**: Correct sequence (dendrites to cell body to axon to axonal end to dendrite of the next neuron).
- **Option 4**: Incorrect sequence (two axonal ends facing each other).

4. **Conclusion**: The correct direction of the flow of electrical impulses is from the dendrites to the cell body, then to the axon, and finally to the axonal end, where it transmits to the next neuron's dendrite. Therefore, the correct answer is **Option 3**.

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