Podcast
Questions and Answers
Which glial cell type is primarily responsible for myelinating axons in the central nervous system?
Which glial cell type is primarily responsible for myelinating axons in the central nervous system?
- Oligodendrocytes (correct)
- Astrocytes
- Ependymal cells
- Microglial cells
Which of the following is a primary function of microglial cells?
Which of the following is a primary function of microglial cells?
- Forming the blood-brain barrier
- Phagocytosing foreign and degenerate material (correct)
- Secreting cerebrospinal fluid
- Myelinating neuronal axons
Astrocytes play a critical role in maintaining the blood-brain barrier (BBB). What additional function do they perform in the CNS?
Astrocytes play a critical role in maintaining the blood-brain barrier (BBB). What additional function do they perform in the CNS?
- Filtering cerebrospinal fluid
- Initiating action potentials in neurons
- Producing myelin for axons
- Regulating the external environment and providing structural support and nutrients (correct)
Which type of neuroglial cell lines the ventricles of the brain and the central canal of the spinal cord?
Which type of neuroglial cell lines the ventricles of the brain and the central canal of the spinal cord?
Which of the following characteristics is unique to oligodendrocytes compared to other glial cells?
Which of the following characteristics is unique to oligodendrocytes compared to other glial cells?
In a scenario involving damage to neural tissue within the CNS, which glial cells would be the first to respond by removing cellular debris?
In a scenario involving damage to neural tissue within the CNS, which glial cells would be the first to respond by removing cellular debris?
If a toxin disrupts the function of astrocytes, which of the following consequences would most likely occur?
If a toxin disrupts the function of astrocytes, which of the following consequences would most likely occur?
Damage to ependymal cells would most directly affect which of the following?
Damage to ependymal cells would most directly affect which of the following?
Which of the following glial cells contributes to structural organization in the CNS?
Which of the following glial cells contributes to structural organization in the CNS?
Identify the glial cell type that serves as the primary regulator of the external environment for neurons within the central nervous system?
Identify the glial cell type that serves as the primary regulator of the external environment for neurons within the central nervous system?
Flashcards
Oligodendrocytes
Oligodendrocytes
Form myelin around axons in the CNS; one cell myelinates several segments.
Microglial cells
Microglial cells
Least numerous and smallest glial cells; phagocytose debris and circulate through neural tissue.
Astrocytes
Astrocytes
Largest, most numerous glial cells; regulate environment, maintain BBB, and provide support.
Ependymal cells
Ependymal cells
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Study Notes
- Four main types of neuroglial cells exist in the CNS
Oligodendrocytes
- Forms myelin around axons; each can myelinate segments of several axons
- Can bind clusters of axons together, playing a role in structural organization
Microglial cells
- Least numerous and smallest glial cell type
- Phagocytose foreign/degenerate material
- Circulate through neural tissue
Astrocytes
- Largest and most numerous glial cell type
- Regulate external environment
- Play a role in maintaining the Blood Brain Barrier; provide structural support and nutrients
Ependymal cells
- Lines the CSF-filled ventricles in brain and the central canal of the spinal cord which lacks a BM
- Assists in producing & circulating cerebrospinal fluid
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