Question

Which of the following glands does the GnRH stimulate?

• A. Posterior pituitary gland and stimulates the secretion of prolactin and oxytocin
• B. Anterior pituitary gland and stimulates the secretion of LH and oxytocin
• C. Anterior pituitary gland and stimulates the secretion of LH and FSH
• D. Posterior pituitary gland and stimulates the secretion of prolactin and relaxin

Answer 1

The correct option is C

Anterior pituitary gland and stimulates the secretion of LH and FSH

The correct option is C.

The explanation for the correct option:

1. GnRH is a gonadotropin-releasing hormone.
2. The hypothalamus releases the GnRH hormone.
3. GnRH further stimulates the anterior pituitary gland.
4. The anterior pituitary gland then secretes FSH (follicle-stimulating hormone) and LH (luteinizing hormone) hormones.
5. Both these hormones are gonadotropins.

The explanation for the incorrect option:

Option A:

1. The posterior pituitary gland releases oxytocin and the anterior pituitary gland released prolactin.
2. Prolactin hormone stimulates milk production.
3. Oxytocin hormone contracts breast muscles.

Option B:

1. The anterior pituitary gland secretes luteinizing hormone (LH) only.
2. LH is the gonadotropin hormone.
3. Oxytocin is not a gonadotropin hormone.
4. Oxytocin production is not stimulated by GnRH.

Option D:

1. GnRH further stimulates the anterior pituitary gland.
2. The anterior pituitary gland then secretes FSH (follicle-stimulating hormone) and LH (luteinizing hormone) hormones.

Final answer: GnRH stimulates the anterior pituitary gland and stimulates the secretion of LH and FSH.