The probable reason for the greyish appearance of cerebral cortex is

Options

A. Presence of bundles of axons in this region
B. the cell body of neuron possess myelin sheath
C. the cell bodies of neuron concentrate here
D. all of the above

Answer

To solve the question regarding the probable reason for the grayish appearance of the cerebral cortex, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Composition of the Cerebral Cortex:**
- The cerebral cortex is primarily composed of neuronal cell bodies, dendrites, and unmyelinated axons. This composition gives it a grayish appearance, which is often referred to as "gray matter."

2. **Analyzing the Options:**
- **Option 1:** Presence of bundles of axons.
- This option is incorrect because bundles of axons (myelinated fibers) are found in white matter, which appears white due to the myelin sheath surrounding the axons.

- **Option 2:** The cell body of neurons possesses myelin sheath.
- This option is also incorrect. While some neurons may have myelinated axons, the cell bodies themselves do not possess a myelin sheath. Myelin is primarily found on the axons, not the cell bodies.

- **Option 3:** The cell bodies of the neurons concentrate here.
- This option is correct. The grayish appearance of the cerebral cortex is due to the concentration of neuronal cell bodies in this region.

- **Option 4:** All of the above.
- This option is incorrect because not all the previous statements are true.

3. **Conclusion:**
- Based on the analysis of the options, the correct answer is **Option 3**: The cell bodies of the neurons concentrate here.

### Final Answer:
The probable reason for the grayish appearance of the cerebral cortex is the concentration of the cell bodies of neurons.

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