What type of glial cell forms the myelin in the peripheral nervous system?

Question

BlackTom AI · Accepted Answer

To approach this question, we start by identifying which glial cells are responsible for myelination in different parts of the nervous system.
Option 1: Microglia. These cells act as immune sentinels in the CNS and do not form myelin around axons, so this choice is incorrect for the myelination question.
Option 2: Schwann cells. In the peripheral nervous system (PNS), Schwann cells wrap around axons to produce the myelin sheath, enabling rapid saltatory conduction; this makes them the correct answer for the PNS case.
Option 3: Oligodendrocytes. These cells perform myelination in the central nervous system (CNS), not in the PNS, so choosing them would misattribute CNS processes to the PNS.
Option 4: Astrocytes. While they provide structural support and regulate the extracellular environment, astrocytes do not form myelin, rendering this option incorrect for myelination purposes.
In summary, the defining factor here is the location: peripheral nervous system myelination is carried out by Schwann cells, whereas CNS myelination is by oligodendrocytes; microglia and astrocytes do not form myelin.

W25 PSYC D024 01Z Intro Psychobiology Week 4 Quiz (Covers Ch.3)

What type of glial cell forms the myelin in the peripheral nervous system?

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Question at position 32 Schwann cells primarily:Wrap around axons to form myelin sheathsCover axons without gaps for continuous insulationInsulate the central nervous system axonsRegulate the extracellular environment of neuron cell bodies

The axons of peripheral system neurons are surrounded by cells called They wrap the axon in many layers of a whitish, non-conductive protein called . Without this coating, the electrical impulse that propagates the nerve signal can be lost to the surrounding tissue.

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W25 PSYC D024 01Z Intro Psychobiology Week 4 Quiz (Covers Ch.3)

What type of glial cell forms the myelin in the peripheral nervous system?

查看解析

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类似问题

Dr. Dre is investigating reflexes in two different animals: a crab and a fish. Action potentials are found to pass more rapidly along the fish's neurons. What is a likely explanation?

True or False: In brain development, myelination starts occurring at the end of infancy and continues throughout childhood but then becomes complete at the end of adolescence.

Question at position 32 Schwann cells primarily:Wrap around axons to form myelin sheathsCover axons without gaps for continuous insulationInsulate the central nervous system axonsRegulate the extracellular environment of neuron cell bodies

The axons of peripheral system neurons are surrounded by cells called ______ They wrap the axon in many layers of a whitish, non-conductive protein called ______. Without this coating, the electrical impulse that propagates the nerve signal can be lost to the surrounding tissue.

Schwann's cells form myelin sheaths around axons in the central nervous system.

What allows the action potential to pass quickly and efficiently down the axon?

What involves an increase in the speed and efficiency with which information travels through the nervous system during brain development in children between the ages of 3 and 5.

What is myelination?

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希望你的学习变得更简单

The axons of peripheral system neurons are surrounded by cells called They wrap the axon in many layers of a whitish, non-conductive protein called . Without this coating, the electrical impulse that propagates the nerve signal can be lost to the surrounding tissue.