AP PSYCHOLOGY

Detailed explanation-1: -The testes synthesize two essential products: testosterone, needed for the development and maintenance of many physiological functions including normal testis function; and sperm, needed for male fertility.

Detailed explanation-2: -Testosterone is secreted by cells that lie between the seminiferous tubules, known as the Leydig cells. The testes also produce inhibin B and anti-Müllerian hormone from Sertoli cells, and insulin-like peptide 3 (INSL3) and oestradiol from the Leydig cells.

Detailed explanation-3: -The luteinizing hormone is then transported to the testis where it stimulates the Leydig cells to produce testosterone [8]. This action is regulated by the presence of D-aspartic acid that is present in the pituitary gland and the testes and has a role in the regulation and release of LH and testosterone (T).

Detailed explanation-4: -Testosterone is produced by the gonads (by the Leydig cells in testes in men and by the ovaries in women), although small quantities are also produced by the adrenal glands in both sexes. It is an androgen, meaning that it stimulates the development of male characteristics.

Detailed explanation-5: -Testosterone is the most important sex hormone in men. More than 95% of the endogenous testosterone is produced in the testes, with 6–7 mg secreted every day. Testosterone is produced by the Leydig cells in the interstitial compartment in response to LH binding to its specific Leydig cell membrane receptor.