The long slender projection of a neuron is known as ________

Explanation

**Step-by-Step Solution:**

1. **Understanding the Structure of a Neuron**: A neuron is a specialized cell that transmits nerve impulses. It consists of three main parts: the cell body, dendrites, and the axon.

2. **Identifying the Long Projection**: The question specifically asks about the long slender projection of a neuron. Among the parts of a neuron, the axon is the structure that fits this description.

3. **Defining the Axon**: The axon is a long, cylindrical projection that extends from the cell body of the neuron. It is responsible for conducting electrical impulses away from the cell body.

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