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

Question

BlackTom AI · Accepted Answer

When evaluating the claim, it’s important to map the cell types to the nervous system region they service.
Option 1: 'True' would assert that Schwann's cells form myelin sheaths around axons in the central nervous system. This is not correct because Schwann cells are responsible for myelination in the peripheral nervous system (PNS), not the CNS.
Option 2: 'False' correctly states that Schwann's cells form myelin sheaths around axons in the peripheral nervous system, while in the central nervous system myelin is produced by oligodendrocytes. This distinction is a fundamental fact in neuroanatomy: one cell type (Schwann) handles PNS myelination, and a different cell type (oligodendrocytes) handles CNS myelination.
To further clarify, the two glial players differ in how many axons or axon segments they myelinate. A single Schwann cell typically myelinates one PNS axon segment, whereas an oligodendrocyte can extend processes to wrap myelin around segments of multiple CNS axons. This structural difference aligns with the regional specialization of the nervous system.
Additionally, recognizing this distinction helps avoid common misconceptions, such as assuming a single glial type serves myelination in both CNS and PNS, which is not the case. Diseases like multiple sclerosis highlight CNS-specific demyelination by oligodendrocytes, reinforcing the correct pairing of cell type and CNS region.

9808 SEM-1 2025 BRUCE ON-CAMPUS AND 7202 SEM-1 2025 BRUCE ON-CAMPUS Practise Quiz: Nervous System (Part A)

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

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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.

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?

Which of the following is not true about myelination?

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9808 SEM-1 2025 BRUCE ON-CAMPUS AND 7202 SEM-1 2025 BRUCE ON-CAMPUS Practise Quiz: Nervous System (Part A)

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

查看解析

登录即可查看完整答案

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.

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?

Which of the following is not true about myelination?

更多留学生实用工具

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.