Q.State the significance of testosterone and of estrogen as gonadal hormones, naming the cells/tissue that secrete each.

[!TLDR]

Testosterone (from Leydig cells of the testis) drives male secondary sexual characters/spermatogenesis; estrogen (from the Graafian follicle) drives female secondary sexual characters/uterine lining growth. …

Testosterone, secreted by the interstitial cells of Leydig in the testis under LH stimulation, is responsible for the development of the male reproductive organs during fetal life, the appearance of male secondary sexual characters at puberty (facial/body hair, deepened voice, increased muscle mass), and, together with FSH acting on the Sertoli cells, for the ongoing maintenance of spermatogenesis. Estrogen, secreted chiefly by the cells surrounding the developing Graafian follicle under FSH stimulation, is responsible for development of the female reproductive organs during fetal life, the appearance of female secondary sexual characters at puberty (breast development, pelvic broadening), and for stimulating prolifera …

For each hormone, state its secreting cell/structure and its two chief roles (secondary sexual characters at puber …

Naming progesterone instead of estrogen as the hormone responsible for female secondary sexual characters -- estrogen drives puberty-related secondary sexual development; progesterone's …