Question

How there is a connection between corona radiata and zona pellucida?

• A. Both are involved in the fertilization process.
• B. They are both involved in the formation of the blastocyst.
• C. They both provide nourishment to the egg.
• D. They are both layers of the ovum, but have different functions.

Hint:

Remember, the zona pellucida facilitates fertilization by interacting with sperm, while the corona radiata assists in nourishing and protecting the egg.

Answer 1

The Correct Option is D

The corona radiata and zona pellucida are both protective layers of the ovum, each with a distinct function. - The corona radiata, composed of follicular cells, envelops the egg to offer protection and nourishment. - The zona pellucida, a glycoprotein coat, surrounds the egg and is vital for fertilization by facilitating sperm binding and preventing multiple sperm from entering the egg. Consequently, while both are egg envelopes, their reproductive roles are separate.