Question

Select the incorrect statement regarding gonadotropin hormones:

• A. LH triggers the secretion of androgens from the Leydig cells.
• B. LH and FSH decrease gradually during the follicular phase.
• C. LH triggers ovulation in the ovary.
• D. FSH stimulates the Sertoli cells which help in spermiogenesis.

Answer 1

The correct option is B

LH and FSH decrease gradually during the follicular phase.

The correct option is B.

Explanation of correct option:

1. During the follicular phase, the primary follicle grows into a mature Graffian follicle.
2. The endometrium of the uterine wall is regenerated and ruptured blood vessels are repaired.
3. These changes are controlled by estrogens.
4. The level of estrogens is controlled by FSH and LH.
5. Hence, the level of LH and FSH increase during the follicular phase.

Explanation of incorrect options:

Option A:

LH acts on Leydig cells and stimulates the synthesis of androgens like testosterone.

Option C:

During the ovulatory phase, the LH and FSH levels are the highest.

Option D:

1. FSH stimulates Sertoli cells to secrete androgen binding protein and inhibin.
2. It directly acts on spermatogonia which further stimulates production of sperms.

Final answer: The incorrect statement is LH and FSH which increase gradually during the follicular phase.