What is the function of an axon?

What is the function of an axon?

• A. Receives signals from other neurons.
• B. Conducts impulses away from the soma.
• C. Contains the nucleus.
• D. Integrates synaptic inputs at the soma.

Answer: (B)

The function being tested is the directionality of neuronal signaling. An axon is the output highway of a neuron, carrying electrical impulses away from the cell body toward synaptic terminals. These impulses, or action potentials, are generated at the axon initial segment and travel along the axon, often speeding up with myelin and jumping between nodes of Ranvier. When the impulse reaches the axon terminals, it triggers neurotransmitter release to communicate with downstream neurons or effectors. This is why the axon is described as conducting impulses away from the soma. In contrast, dendrites and the soma primarily receive and integrate inputs, and the nucleus sits in the soma, not in the axon.

The function being tested is the directionality of neuronal signaling. An axon is the output highway of a neuron, carrying electrical impulses away from the cell body toward synaptic terminals. These impulses, or action potentials, are generated at the axon initial segment and travel along the axon, often speeding up with myelin and jumping between nodes of Ranvier. When the impulse reaches the axon terminals, it triggers neurotransmitter release to communicate with downstream neurons or effectors. This is why the axon is described as conducting impulses away from the soma. In contrast, dendrites and the soma primarily receive and integrate inputs, and the nucleus sits in the soma, not in the axon.