A secondary oocyte is surrounded by a ring of proteins and glycoproteins -[Free] B30
A secondary oocyte is surrounded by a ring of proteins and glycoproteins called the ◻ germinal epithelium corona radiata thecal body zona pellucida
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Answer
Q: A secondary oocyte is surrounded by a ring of proteins and glycoproteins called the ◻
✅ Correct Answer: Zona Pellucida
🔬 The secondary oocyte is the cell that will eventually develop into the ovum (egg) following fertilization.
🧬 It is surrounded by several important protective layers:
- Corona Radiata: The outermost layer, made up of follicular cells.
- Zona Pellucida: A thick, transparent glycoprotein layer located beneath the corona radiata.
- Oolemma: The actual cell membrane of the oocyte found beneath the zona pellucida.
❌ Germinal epithelium refers to the surface layer of the ovary, not the oocyte itself.
❌ Thecal body (theca cells) surrounds the granulosa cells in the follicle, not directly surrounding the oocyte.
✅ The structure composed of a ring of proteins and glycoproteins that directly surrounds the secondary oocyte is the Zona Pellucida. This layer plays a crucial role in fertilization and early embryonic development.