Which of the following layers in an antral follicle is acellular?
- Stroma
- Zona pellucida
- Granulosa
- Theca interna
Answer
(2) Zona pellucida
Solution
In an antral (tertiary / Graafian) follicle, the theca layers and the granulosa layer are made up of cells, and the stroma is the cellular connective tissue of the ovary.
∵ The secondary oocyte forms a new membrane called zona pellucida surrounding it, which is a non-cellular glycoprotein layer.
∴ The acellular layer is the zona pellucida.
Answer: (2)