Testosterone: The Male Sex Hormone.
On onset of Puberty in the male, the hypothalamus starts producing “Gonadotropin Releasing Hormone (GnRH).
Under influence of GnRH the Pituitary Gland produces two hormones as,
Luteinizing Hormone (LH).
Follicle Stimulating Hormone (FSH).
LH stimulates the Leydig Cells (Interstitial cells) present in testes, which secretes the male sex hormone “Testosterone”.
FSH acts indirectly to stimulate the process of spermatogenesis.
The sertoli cells in seminiferous tubules of testes under influence of FSH and Testosterone start producing a protein called Androgen Binding Protein (ABP), testosterone remains attached with this protein and hence local concentration of testosterone increases.
Testosterone stimulates and maintains the process of spermatogenesis.
The spermatogenesis process is terminated by Inhibin a hormone secreted by Sertoli cells.
The testosterone is responsible for development of secondary sex characteristics in boys viz.
Facial and body hair growth.
Increased muscle mass.
Increase in height.
Broadening of shoulders.
Deepening of voice.
Adam's apple become prominent.
Enlargement of male sex organs.
The testosterone is also responsible for,
Spermatogenesis,
Maintaining the libido.
Maintaining the muscle mass and bone density.
Enhanced wound healing.
Low testosterone levels are called “Hypogonadism” and the disorder is characterized by,
A drop in sex drive
Poor erections
Low sperm count
Enlarged breasts.
Commonly asked question.
Write a short note on male sex hormone “Testosterone”.
Labels: Human Anatomy and Physiology
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