Myelin sheath is produced by:
Correct answer: D. Schwann cells and oligodendrocytes.
- A. Astrocytes and Schwann cells
- B. Oligodendrocytes and osteoclasts
- C. Osteoclasts and astrocytes
- D. Schwann cells and oligodendrocytes.
Explanation
Schwann cells and oligodendrocytes form myelin sheath around the axon. Myelin sheath serves as an insulating layer, preventing loss of energy of the nerve impulse during its passage along the fibre.
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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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