Question

The hypothalamic hormone GnRH, which is essential for reproduction, works on

• A. Posterior pituitary gland promotes the release of oxytocin and FSH
• B. Anterior pituitary gland and promotes the release of LH and FSH
• C. Anterior pituitary gland and promotes the release of oxytocin and LH
• D. Posterior pituitary gland and promotes the release of LH and relaxin.

Answer 1

The correct option is B

Anterior pituitary gland and promotes the release of LH and FSH

The correct option is B.

Explanation for correct option:

1. A gonadotropin-releasing hormone is GnRH.
2. LH (luteinizing hormone) and FSH (follicle-stimulating hormone) are two gonadotropins that are stimulated by GnRH's action on the anterior pituitary.
3. LH and FSH act on male and female gonads and are involved in the regulation of reproductive activities.

Explanation for incorrect options:

Option A:

1. The hypothalamic hormone GnRH doesn't stimulate the posterior pituitary gland to release oxytocin.

Option C:

1. The hypothalamic hormone GnRH doesn't stimulate the release of oxytocin and LH from the anterior pituitary gland.

Option D:

1. The hypothalamic hormone GnRH doesn't stimulate the release of LH and relaxin from the posterior pituitary gland either.

Final answer: The hypothalamic hormone GnRH acts on the anterior pituitary gland and promotes the release of LH and FSH.