Examples of Neuroglia: Astrocytes, Oligodendrocytes, Microglia, and Ependymal Cells

📚 Quick Study Guide

• 🧠 Astrocytes: Most abundant glial cells in the CNS. Provide structural support, regulate the chemical environment, and form the blood-brain barrier.
• 🌳 Oligodendrocytes: Form myelin sheaths around axons in the CNS, increasing the speed of nerve impulse transmission. One oligodendrocyte can myelinate multiple axons.
• 🛡️ Microglia: Act as the immune cells of the CNS. Perform phagocytosis to remove debris and pathogens.
• ✏️ Ependymal Cells: Line the ventricles of the brain and the central canal of the spinal cord. Help circulate cerebrospinal fluid (CSF).

🧪 Practice Quiz

1. Which type of neuroglia is responsible for forming the myelin sheath in the central nervous system?

   1. Astrocytes
   2. Oligodendrocytes
   3. Microglia
   4. Ependymal Cells

2. Which of the following is a function of astrocytes?

   1. Phagocytosis of pathogens
   2. Formation of cerebrospinal fluid
   3. Regulation of the chemical environment around neurons
   4. Myelination of axons

3. Which neuroglia acts as the primary immune cell in the central nervous system?

   1. Astrocytes
   2. Oligodendrocytes
   3. Microglia
   4. Ependymal Cells

4. Which type of neuroglia helps to circulate cerebrospinal fluid (CSF)?

   1. Astrocytes
   2. Oligodendrocytes
   3. Microglia
   4. Ependymal Cells

5. Which of the following neuroglia contributes to the formation of the blood-brain barrier?

   1. Astrocytes
   2. Oligodendrocytes
   3. Microglia
   4. Ependymal Cells

6. If a patient has damage to their myelin sheath in the CNS, which type of neuroglia is most likely affected?

   1. Astrocytes
   2. Oligodendrocytes
   3. Microglia
   4. Ependymal Cells

7. Which of the following is NOT a function of neuroglia?

   1. Supporting and insulating neurons
   2. Transmitting electrical signals
   3. Protecting neurons from pathogens
   4. Maintaining the chemical environment around neurons