What is the function of zona pellucida?
Ans. C. Prevention of multiple sperm entry* Zona pellucida is a glycoprotein layer surrounding the membrane of oocytes.* Once sperms reach ova, there is release of hyaluronidase - penetration of corona radiata and cumulus cells by sperm.* Glycoproteins on the outer surface of the sperm then bind with glycoproteins on the zona pellucida of the ovum.* Zona reaction: Once sperm penetrates zona pellucida, the ovum become impermeable to other sperms, this prevents polyspermy.
Prevent wrong implantation of embryo
Formation of blastocyst
Prevention of multiple sperm entry
Prevent wrong attachment of sperm
Obstetrical Anatomy