Multiple Choice
In a typical neuron, the cell body (soma) contains which of the following structures?
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9. Transport Across Membranes
Ion Channels and Neurons
Multiple Choice
In the central nervous system (CNS), which type of glial cell is the most abundant?
A
Ependymal cells
B
Microglia
C
Oligodendrocytes
D
Astrocytes
Verified step by step guidance1
Step 1: Understand the role of glial cells in the central nervous system (CNS). Glial cells support neurons by providing structural support, nutrition, insulation, and immune defense.
Step 2: Identify the main types of glial cells in the CNS: astrocytes, oligodendrocytes, microglia, and ependymal cells.
Step 3: Recall the functions and relative abundance of each glial cell type. For example, oligodendrocytes produce myelin, microglia act as immune cells, and ependymal cells line the ventricles.
Step 4: Recognize that astrocytes are the most abundant glial cells in the CNS. They maintain the blood-brain barrier, regulate ion balance, and support neuronal metabolism.
Step 5: Conclude that among the options given, astrocytes are the most numerous glial cells in the CNS.
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