The long appendage extending from the cell body of a neuron is referred to as the __________.

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The long appendage extending from the cell body of a neuron is called an axon. Dendrites are the shorter branches that also extend from the cell body, but they are responsible for receiving signals from other neurons. The synaptic knob is a bulbous structure at the end of the axon where neurotransmitters are released to communicate with other neurons across the synaptic cleft, which is the small gap between the synaptic knob and the target neuron.

The Long Appendage Extending from the Cell Body of a Neuron