Which of the following statements is incorrect regarding glial cells?

Options

A. They do not conduct electrical impulses.
B. Neurons can divide with help of glial cells.
C. Astroglia form the blood-brain barrier in the brain capillaries.
D. They are the most abundant type of cells in the central nervous system

Answer

To determine which statement is incorrect regarding glial cells, we will analyze each option step by step.

**Step 1: Understanding Glial Cells**
- Glial cells, also known as neuroglia, are non-neuronal cells in the nervous system that support and protect neurons. They play various roles, including providing nutrition, maintaining homeostasis, and forming myelin.

**Step 2: Analyzing the Statements**
- We need to evaluate the provided statements about glial cells to identify the incorrect one.

**Step 3: Evaluating Each Option**
1. **Option 1: Glial cells do not conduct electrical impulses.**
- This statement is **correct**. Glial cells do not transmit electrical impulses; that function is specific to neurons.

2. **Option 2: Glial cells are dividing cells.**
- This statement is **incorrect**. While glial cells can divide, they do not function as the primary cells for division in the nervous system. Neurons are the main cells responsible for transmitting signals and do not divide.

3. **Option 3: Astroglia form the blood-brain barrier.**
- This statement is **correct**. Astrocytes (a type of glial cell) contribute to the formation of the blood-brain barrier, which protects the brain from harmful substances.

4. **Option 4: Glial cells are the most abundant type of cells in the central nervous system.**
- This statement is **correct**. Glial cells outnumber neurons in the central nervous system, with estimates suggesting that they make up about 90% of the total cell population.

**Step 4: Conclusion**
- The incorrect statement regarding glial cells is **Option 2: Glial cells are dividing cells**.

Thus, the final answer is that the second option is incorrect.

---