The part of the neuron that is usually a single long extension that conducts an impulse to a muscle or another neuron is the

Question

Quizplus · Accepted Answer

The axon is the part of the neuron that conducts impulses away from the cell body and can be a single long extension.

Answer: D and E are incorrect
 Dendrites are extensions that receive impulses from other neurons or sensory receptors, while the node of Ranvier is a gap in the myelin sheath of an axon that helps to increase the speed of nerve impulses.

Answer: A and B are incorrect 
 The synapse is the junction between two neurons or a neuron and a muscle or gland, while the cell body contains the nucleus and other organelles of the neuron.

The Part of the Neuron That Is Usually a Single