Which of the following cell types are neuroglial cells located within the peripheral nervous system?

• A. Oligodendrocytes
• B. Microglia
• C. Schwann cells
• D. Astrocytes

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the context of the question. Neuroglial cells are supportive cells in the nervous system that help maintain homeostasis, form myelin, and provide support and protection for neurons. The question specifically asks about neuroglial cells located in the peripheral nervous system (PNS).
2. Step 2: Differentiate between the central nervous system (CNS) and peripheral nervous system (PNS). The CNS consists of the brain and spinal cord, while the PNS includes all the nerves and ganglia outside the CNS. Neuroglial cells in the CNS include oligodendrocytes, astrocytes, and microglia, while Schwann cells are neuroglial cells found in the PNS.
3. Step 3: Examine the functions of each cell type listed in the question: - Oligodendrocytes: These are neuroglial cells in the CNS responsible for forming myelin sheaths around axons. - Microglia: These are immune cells in the CNS that act as macrophages, clearing debris and pathogens. - Schwann cells: These are neuroglial cells in the PNS responsible for forming myelin sheaths around axons and aiding in nerve regeneration. - Astrocytes: These are neuroglial cells in the CNS that provide structural support, regulate the blood-brain barrier, and maintain the extracellular environment.
4. Step 4: Identify the correct answer based on the location of the neuroglial cells. Schwann cells are the only neuroglial cells listed that are located in the peripheral nervous system (PNS).
5. Step 5: Conclude that Schwann cells are the correct answer because they are neuroglial cells specifically found in the PNS, while the other cell types listed are located in the CNS.