Concept: This question tests your understanding of the basic structure and function of a neuron, specifically focusing on the role of the axon in nerve impulse transmission.

Why (D) is correct: The primary function of an axon is to transmit or conduct nerve impulses (action potentials) away from the neuron's cell body (soma) towards other neurons, muscles, or glands. It acts like a long cable for efficient signal propagation.

Why other options are wrong:

A) Transformation of nerve impulse: Neurons transmit impulses; they don't transform them into a different type of signal within the axon itself.

B) Reception of stimuli from neurons: This is primarily the function of dendrites and the cell body.

C) Reception of external stimuli: This is the function of sensory receptors, not typically the axon of a neuron.

NEET Tip: Remember the flow of information in a neuron: Dendrites receive, Cell body processes, Axon conducts, Axon terminals transmit.

Correct Answer: (D)