To review:
The sequence of events in hormonal regulation of the male reproductive system:
a. The luteinizing hormone (LH) stimulates the interstitial cells to produce testosterone and the follicle-stimulating hormone (FSH) sustentacular cells to secrete inhibin and androgen-binding protein, which keeps some of the testosterone near the spermatogenic cells.
b. Testosterone and inhibin both exert negative feedback controls on the hypothalamus and the anterior pituitary.
c. The androgen-binding protein binds testosterone.
d. Gonadotropin-releasing hormone (GnRH) stimulates the anterior pituitary to secrete FSH and LH.
e. The hypothalamus releases GnRH.
Introduction:
Testosterone regulates spermatogenesis and other aspects of male reproductive physiology. The secretion by the hypothalamus is under the negative-feedback regulation. In this regulatory mechanism, the hypothalamus, testes, and anterior pituitary are involved.
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Human Anatomy & Physiology (2nd Edition)
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- Which of the following correctly describes the results of andropause? Select one: A. Lower sperm count and increased rate of testicular cancer. B. Increased estrogen levels and decrease testosterone levels. C. Decreased fertility and increased testosterone levels. D. Reduction of muscle and bone mass and lower sperm count.arrow_forwardWhich of the following statement does NOT describe the role of luteinizing hormones (LH) in the female reproductive system? Select one: A. Causes the release of mature ovum from the ovary B. Suppress the production of estrogen C. Stimulate the production of progesterone D. Stimulate the development of the corpus luteumarrow_forwardWhich of the following statements is NOT a role of follicle stimulating hormone (FSH) in the male reproductive system? a. It is suppressed by increased levels of testosterone and inhibin. b. It stimulates the Sertoli cells to produce sperm. c. It increases the production of inhibin. d. It stimulates a primary follicle to develop.arrow_forward
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