
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Estrogen (a female sex hormone) levels continuously increase during a woman's menstrual cycle. Estrogen levels drop once menstruation occurs (the ovaries stop releasing estrogen).
Is this an example of positive or negative feedback?
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- In research of reproductive physiology, researchers can probe the function of the HPG axis by injecting animals with the hormone GnRH. GnRH injection will increase testosterone levels decrease testosterone levels increase cortisol levels decrease cortisol levelsarrow_forwardLuteinizing hormone (LH): Which of the following is correct ? Stimulates testosterone secretion LH surge stimulates ovulation Stimulates gonadotropin-releasing hormone (GnRH) secretionarrow_forwardA reproductive hormone that is secreted directly from the anterior pituitary is follicle-stimulating hormone. progesterone. testosterone. estradiol. gonadotropin-releasing hormone.arrow_forward
- Please draw a feedback loop for an individual who has secondary hypogonadism and is receiving testosterone replacement therapy. Would there be an excess amount of GnRH or a low amount? And does the testosterone feedback to anywhere or is it even possible to create a negative feedback loop for this?arrow_forwardRead the following passage: When oestrogen concentration is high it stimulates the release of LH. LH stimulates the ovaries to release more oestrogen. State whether this is an example of negative or positive feedback and which organs are involved. Explain your answer.arrow_forwardBoth pituitary (FSH and LH) and ovarian (estrogen and progesterone) hormones are involved in regulating the menstrual cycle. Which of the following most accurately describes the order these hormones are released at their highest levels from day 1 to the end of a menstrual cycle if no pregnancy occurs? Select one: a. LH, FSH, estrogen, progesterone b. FSH, estrogen, progesterone, LH c. FSH, estrogen, LH, progesterone d. FSH, LH, estrogen, progesteronearrow_forward
- Which of the following statements is NOT about follicle stimulating hormone (FSH) in the male reproductive system? Select one: a. It increases the production of inhibin. b. It is suppressed by increased levels of testosterone and inhibin. c. It is stimulated by GnRH and LH. d. It stimulates the seminiferous tubules to produce sperm.arrow_forwardIf progesterone and estrogen were set at artificially moderately high levels for a long period, what would result?arrow_forwardChoose between LH, inhibin, FHS and testosteronearrow_forward
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