Luteinizing hormone stimulates testosterone secretion by the leydig cells of the testes.

a. True

b. False

True

Explanation:

Testosterone is the primary male sex hormone. It is produced by the Leydig cells of the testis. The testosterone produced by both males and females. The amount is more male than females. In females, testosterone is in the form of androgen hormone.

The anterior pituitary secretes 2 hormones i. e. LH and FSH. The luteinizing hormone from the pituitary gland enters into the interstitial space of the testis. In the interstitial space, Leydig cells are present, which are the target organ for LH. The LH stimulates the Leydig cells to produce testosterone. Hence Leydig cells are also called interstitial cells.

Testosterone secretes from the Leydig cells of the testis and mixes with the bloodstream. It produces in the presence of LH. Then it reaches to different cells of the body by the bloodstream. Testosterone maintains bone and muscle growth, induces the secondary sexual characters.

When testosterone level is high in the blood, it sends a signal to the brain to decrease the secretion of testosterone. This is the negative feedback mechanism of testosterone.