Which of the following layers in an antral follicle is acellular?

Options

A. Stroma
B. Zona pellucida
C. Granulosa
D. Theca interna

Answer

**Step-by-Step Solution:**

1. **Understanding the Antral Follicle Structure:**
An antral follicle consists of several layers, including the granulosa layer, the zona pellucida, and the theca layers (theca interna and theca externa).

2. **Identifying the Layers:**
- **Granulosa Layer:** This layer is composed of multiple layers of granulosa cells, which are involved in the development of the oocyte and hormone production.
- **Zona Pellucida:** This is a glycoprotein layer that surrounds the oocyte and is known to be acellular (non-cellular).
- **Theca Layers:** The theca interna and theca externa are also composed of cells.

3. **Determining the Acellular Layer:**
The question specifically asks for the acellular layer. The zona pellucida is the only layer in the antral follicle that is acellular, as it is made up of glycoproteins and does not contain any cells.

4. **Conclusion:**
Therefore, the correct answer to the question is the zona pellucida.

**Final Answer:** Zona Pellucida

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