Which description of a glial cell and its function is correct?
A)astrocytes-metabolize neurotransmitters and modulate synaptic effectiveness
B)oligodendrocytes-produce the myelin sheaths of myelinated neurons in the peripheral nervous system
C)microglia-produce the myelin sheaths of myelinated neurons in the central nervous system
D)radial glia-the source of immunoprotection against pathogens
E)Schwann cells-provide nutritional support to nonmyelinated neurons

Question

Quizplus · Accepted Answer

Astrocytes are glial cells that have various functions, including metabolizing neurotransmitters and modulating synaptic effectiveness. They also help regulate the concentrations of ions, nutrients, and gases in the extracellular space of the brain.

Answer: E 
 Schwann cells are glial cells that provide nutritional support to nonmyelinated neurons in the peripheral nervous system. They also produce the myelin sheaths of myelinated neurons in the peripheral nervous system.

Note: Option B is incorrect because oligodendrocytes produce the myelin sheaths of myelinated neurons in the central nervous system, not the peripheral nervous system. Option C is also incorrect because microglia are involved in immune defense and surveillance in the central nervous system, not myelin production. Option D is incorrect because radial glia are involved in neurogenesis and neuronal migration during development, not immunoprotection.

Which Description of a Glial Cell and Its Function Is