FSH and LH then stimulate the testis to produce testosterone. When testosterone levels are low, gonadotropin-releasing hormone (GnRH) is released by the hypothalamus, which in turn stimulates the pituitary gland to release FSH and LH. Hormone (FSH) and gonadotropin-releasing hormone (GnRH). An example of this is the release of the hormone adrenaline, which is released by the adrenal gland. ![]() Hormones involved are luteinizing hormone (LH), follicle-stimulating Pituitary, and testicular endocrine glands. Testosterone regulation by cooperation between the hypothalamus, The adrenal medulla, the inner part of an adrenal gland, controls hormones that initiate the flight or fight response. The adrenal glands also make small amounts of the. Testosterone, like all hormones, works via long distance signaling and is regulated by other hormones as illustrated below: The hormones produced by the adrenal glands include aldosterone, cortisol, epinephrine and norepinephrine. In adult males, testosterone plays a key role in the development of reproductive organs and it promotes the secondary sexual characteristics of body and facial hair, increased muscle and bone mass, and a deep voice. How does the pituitary gland work The pituitary gland is divided into two parts: anterior pituitary gland and posterior pituitary gland. ![]() Testosterone is a steroid hormone produced by all vertebrate animals and, in humans and other mammals, it is secreted in large amounts by the testes of males and to a much lesser extent, the ovaries of females.
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