Question

Short / Long answer type questions.
What is a nerve fibre? Describe the structure of a myelinated fibre.

Answer 1

• An axon or nerve fibre, is a long, slender projection of a nerve cell, or neuron, in vertebrates, that typically conducts electrical impulses known as action potentials away from the nerve cell body.
• The myelinated nerve fibres contain a myelin sheath, surrounding the axons of the nerve cells.
• Schwann cells or oligodendrocytes in myelinated nerve fibres produce a myelin sheath.
• The saltatory conduction in the myelinated nerve fibres increases the speed of conduction of the nerve impulses.