Neuroscience
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Cellular and Molecular Neurobiology 8. Organization of Cell Types |
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Neuroscience
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Cellular and Molecular Neurobiology 8. Organization of Cell Types |
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Following damage to nervous tissue, microglia proliferate and migrate to the site of injury where they clear cellular debris by phagocytosis. The reacting microglia have a swollen form with shortened processes and are difficult to discriminate from phagocytes from the periphery or migrating perivascular cells. It is estimated that at least one third of the phagocytes appearing in the area of a lesion are of CNS origin. |
Figure 8.18 |
Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)
A. Neurons
B. Microglia
C. Fibrous astrocytes
D. Protoplasmic astrocytes
E. Macrophages
Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)
A. Neurons This answer is INCORRECT.
Although it is currently controversial, the preponderance of evidence indicates that neurons do not undergo cell division once they have matured during the development of the organism.B. Microglia
C. Fibrous astrocytes
D. Protoplasmic astrocytes
E. Macrophages
Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)
A. Neurons
B. Microglia This answer is CORRECT!
Microglia both divide and migrate into regions of cellular injury within the central nervous system in response to injury.C. Fibrous astrocytes
D. Protoplasmic astrocytes
E. Macrophages
Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)
A. Neurons
B. Microglia
C. Fibrous astrocytes This answer is CORRECT!
Both fibrous and protoplasmic astrocytes undergo cell division in response to injury.D. Protoplasmic astrocytes
E. Macrophages
Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)
A. Neurons
B. Microglia
C. Fibrous astrocytes
D. Protoplasmic astrocytes This answer is CORRECT!
Both fibrous and protoplasmic astrocytes undergo cell division in response to injury.E. Macrophages
Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)
A. Neurons
B. Microglia
C. Fibrous astrocytes
D. Protoplasmic astrocytes
E. Macrophages This answer is CORRECT!
Macrophages appear in the CNS following injury and work together with the CNS glial cells to phagocytize CNS debris.
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