Question

Role of zona pellucida is to

• A. Provide nutrition to the embryo
• B. Prevent the implantation of the blastocyst of an abnormal site
• C. Divide embryo
• D. All of the above

Answer 1

The correct option is B Prevent the implantation of the blastocyst of an abnormal site

The zona pellucida is a thick extracellular coat surrounding the embryo. The role of zona pellucida is to prevent the implantation of the blastocyst at an abnormal site. It prevents the adhesion of the blastocyst till it reaches the proper implantation site. It help in communication between oocytes and follicle cells. It also protects embryo.

Thus, the correct answer is 'Prevent the implantation of the blastocyst of an abnormal site.'