Question

what are axon in neuron covered by ?? pls tell a) myelin sheath b) dendrites c) nodes of Ranvier d) none of these​

Answer 1

Answer:

Myelin is a lipid-rich (fatty) substance that surrounds nerve cell axons (the nervous system's "wires") to insulate them and increase the rate at which electrical impulses (called action potentials) are passed along the axon.

The action potential (AP), the fundamental signal of the nervous system, is carried by two types of axons: unmyelinated and myelinated fibers. In the former the action potential propagates continuously along the axon as established in large-diameter fibers.

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Answer 2

Answer:

Axoniin a neuron is covered by a myelin sheath. This is is because it acts as a protective sheet