Question

If both the ovaries are removed from rat, then which of the following hormone is decreased in the blood?

• A. Oxytocin
• B. Prolactin
• C. Estrogen
• D. Gonadotropin releasing factor

Answer 1

The correct option is C Estrogen

A. Oxytocin is secreted from the posterior pituitary and helps in the contraction of uterus during childbirth and also stimulates release of milk from mammary glands i.e. lactation.

B. Prolactin, also known as lactogenic hormone is produced by the pituitary gland. This hormones stimulates the production of milk in mammary glands during pregnancy.

C. Estrogen is the female sex hormone secreted from ovarian follicles and stimulate the development of female secondary sex organs.

D. Gonadotropin releasing factor or hormone (GnRH) is secreted from hypothalamus and stimulates the release of Luteinizing hormone and Follicle stimulating hormone from the anterior pituitary.

Hence, if both the ovaries are removed from rat, then estrogen is decreased in the blood.

So, the correct answer is 'Estrogen'.