College of Massage Therapists of British Columbia (CMTBC) Practice Exam

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What triggers the production of testosterone in the male body?

FSH from the pituitary gland
LH stimulating Leydig cells
TSH from the thyroid gland
Adrenaline from the adrenal glands

The correct answer is: LH stimulating Leydig cells

The production of testosterone in the male body is primarily triggered by luteinizing hormone (LH) stimulating Leydig cells, which are located in the testes. When LH is released from the pituitary gland in response to signals from the hypothalamus, it binds to specific receptors on Leydig cells. This binding stimulates these cells to produce and secrete testosterone, which plays a crucial role in various physiological processes including the development of male secondary sexual characteristics, sperm production, and maintenance of libido. Other hormones mentioned, such as follicle-stimulating hormone (FSH) and thyroid-stimulating hormone (TSH), while important for various functions in the body, do not directly stimulate testosterone production. FSH primarily acts on the Sertoli cells in the testes to support sperm production. TSH influences thyroid hormone production but has no direct impact on testosterone synthesis. Adrenaline, produced by the adrenal glands, is involved in the body's "fight or flight" response and does not play a role in the regulation of testosterone levels.