Question

In human beings, the follicular cells of Graafian follicle secrete ..........

• A. human chorionic gonadotropin
• B. relaxin
• C. testosterone
• D. estrogen

Hint:

In reproductive biology, understanding the roles of hormones like estrogen is crucial for grasping menstrual cycles and fertility processes.

Answer 1

The Correct Option is D

Step 1: Understanding the question.
The Graafian follicle is a mature ovarian follicle that releases eggs during ovulation. It secretes various hormones essential for reproduction. Estrogen is the hormone secreted by the follicular cells of the Graafian follicle, playing a crucial role in the menstrual cycle and female reproduction.
Step 2: Analyzing the options.
(A) human chorionic gonadotropin: This hormone is produced during pregnancy by the placenta, not by the Graafian follicle.
(B) relaxin: This hormone is involved in pregnancy, particularly in relaxing the uterine muscles, but it is not secreted by the Graafian follicle.
(C) testosterone: This hormone is primarily produced in the testes in males, not by the Graafian follicle.
(D) estrogen: Correct — Estrogen is the hormone secreted by the follicular cells of the Graafian follicle. It is essential for regulating the reproductive system and preparing the body for potential pregnancy.
Step 3: Conclusion.
The correct answer is (D) estrogen, as it is the hormone secreted by the Graafian follicle.