Multiple Choice
The period in which an axon membrane cannot generate an action potential is called __________.
45. Nervous System
Neurons and Action Potentials
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Schwann cells make up the __________.
A
neurons
B
nodes of Ranvier
C
axons
D
myelin sheath in axons of the central nervous system (CNS)
E
myelin sheath in axons of the peripheral nervous system (PNS)
Verified step by step guidance1
Begin by understanding the role of Schwann cells in the nervous system. Schwann cells are a type of glial cell found in the peripheral nervous system (PNS).
Recognize that Schwann cells are responsible for producing the myelin sheath, which is a fatty layer that insulates axons and enhances the speed of electrical signal transmission.
Differentiate between the central nervous system (CNS) and the peripheral nervous system (PNS). Schwann cells are specific to the PNS, while oligodendrocytes perform a similar function in the CNS.
Identify the components listed in the problem: neurons, nodes of Ranvier, axons, and myelin sheath. Understand that Schwann cells are directly involved in forming the myelin sheath in the PNS.
Conclude that the correct answer is the myelin sheath in axons of the peripheral nervous system (PNS), as Schwann cells are responsible for this function.
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