Myelination increases conduction velocity by
Correct answer: B. Saltatory conduction
- A. Increasing axon diameter
- B. Saltatory conduction
- C. Increasing Na+ channels
- D. Decreasing resistance
Explanation
Myelin insulates the axon, allowing action potentials to jump between nodes of Ranvier (saltatory conduction), greatly increasing speed.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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