2. androgen-binding protein, inhibin, and estrogen by Sertoli cells.
4. The sperm mature and are stored in the epididymis. At the time of ejaculation, sperm are moved by muscular contractions of the epididymis and vas deferens through the ejacu-latory ducts into the prostatic urethra. The sperm are finally moved out of the body through the urethra in the penis.
5. LH and FSH secretion by the anterior pituitary are controlled by gonadotropin-releasing hormone (GnRH).
7. Androgens have several target organs and have roles in regulating the development of secondary sex characteristics, the libido, and sexual behavior.
9. Male reproductive dysfunction is often due to a lack of LH and FSH secretion or abnormal testicular morphology.
The testes have two primary functions, spermatogenesis, the process of producing mature sperm, and steroidogenesis, the synthesis of testosterone. Both processes are regulated by the pituitary gonadotropins LH and FSH. Testosterone is the primary sex hormone in the male and is responsible for primary and secondary sex characteristics. The primary sex characteristics include those structures responsible for promoting the development, preservation, and delivery of sperm. The secondary sex characteristics are those structures and behavioral features that make men externally different from women and include the typical male hair pattern, deep voice, and large muscle and bone masses.
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