Question

Which one of the following statements is applicable to satellite cells?

• A. These cells encircle PNS axons. They form the myelin sheath around the axons.
• B. These are the flat cells surrounding the cell bodies of neurons in PNS ganglia.
• C. These are cuboidal to columnar cells arranged in a single layer that possess microvilli and cilia.
• D. These are small cells with slender processes that give off numerous spinelike projections.

Hint:

Remember the two main glial cells of the PNS and their primary associations:

\textbf{Schwann Cells} \(\rightarrow\) \textbf{Axons} (myelination)
\textbf{Satellite Cells} \(\rightarrow\) \textbf{Cell bodies} (support in ganglia) \end{itemize}

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Satellite cells are a type of glial cell found in the peripheral nervous system (PNS). Glial cells are non-neuronal cells that provide support and protection for neurons. The question asks for the correct description of satellite cells.

Step 2: Detailed Explanation:
- Statement 1: This describes Schwann cells. Schwann cells are the glial cells in the PNS responsible for encircling axons and forming the myelin sheath.
- Statement 2: This is the correct definition of satellite cells. They are flat cells that surround the cell bodies (soma) of neurons located within ganglia of the PNS. They provide structural support and regulate the chemical environment of the neurons.
- Statement 3: This describes a type of epithelial tissue, not a glial cell.
- Statement 4: This is the characteristic description of microglia, which are the resident immune cells of the central nervous system (CNS).

Step 3: Final Answer:
The statement that accurately describes satellite cells is that they are flat cells surrounding neuronal cell bodies in PNS ganglia. Therefore, option (B) is correct.