Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Chapter 27, Problem 24CTQ
While anabolic steroids (synthetic testosterone) bulk up muscles, they can also affect testosterone production in the testis. Using what you know about negative feedback, describe what would happen to testosterone production in the testis if a male takes large amounts of synthetic testosterone.
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Oestrogen, follicle-stimulating hormone (FSH) and luteinising hormone (LH) works together to coordinate the menstrual cycle. A woman will be infertile if her pituitary gland does not release enough FSH. Explain how injections of FSH could increase her chance of having a baby
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Men with decreased anterior pituitary gland function often have decreased sperm production as well as low testosterone concentrations. Would you expect the administration of testosterone alone to restore sperm production to normal?
Chapter 27 Solutions
Anatomy & Physiology
Ch. 27 - Watch this video...Ch. 27 - Watch this video...Ch. 27 - Watch this video...Ch. 27 - Watch this series of videos...Ch. 27 - A babys gender is determined at conception, and...Ch. 27 - What are male gametes called? ova sperm testes...Ch. 27 - Leydig cells ________. secrete testosterone...Ch. 27 - Which hypothalamic hormone contributes to the...Ch. 27 - What is the function of the epididymis? sperm...Ch. 27 - Spermatogenesis takes place in the ________....
Ch. 27 - What are the female gonads called? oocytes ova...Ch. 27 - When do the oogonia undergo mitosis? before birth....Ch. 27 - From what structure does the corpus luteum...Ch. 27 - Where does fertilization of the egg by the sperm...Ch. 27 - Why do estrogen levels fall after menopause? The...Ch. 27 - The vulva includes the ____________. lactiferous...Ch. 27 - What controls whether an embryo will develop...Ch. 27 - Without SRY expression, an embryo will develop...Ch. 27 - The timing of puberty can be influenced by which...Ch. 27 - Briefly explain why mature gametes carry only one...Ch. 27 - What special features are evident in sperm cells...Ch. 27 - What do each of the three male accessory glands...Ch. 27 - Describe how penile erection occurs.Ch. 27 - While anabolic steroids (synthetic testosterone)...Ch. 27 - Follow the path of ejaculated sperm from the...Ch. 27 - Identify some differences between meiosis in men...Ch. 27 - Explain the hormonal regulation of the phases of...Ch. 27 - Endometriosis is a disorder in which endometrial...Ch. 27 - Identify the changes in sensitivity that occur in...Ch. 27 - Explain how the internal female and male...Ch. 27 - Explain what would occur during fetal development...
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- Match each hormone with its effect. oxytocin a. growth of facial hair testosterone b. uterus contracts LH c. LH, FSH are released GnRH d. surge causes ovulation FSH e. follicle develops HCG f. milk is produced prolactin g. corpus luteum is maintainedarrow_forwardFigure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardFigure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.arrow_forward
- In the fertility awareness method of birth control, a woman gauges her monthly fertile period by monitoring changes in the consistency of her vaginal mucus. What kind of information does such a method provide about the likelihood of getting pregnant?arrow_forwardWhich hormone causes FSH and LH to be released? a. testosterone b. estrogen c. GnRH d. progesteronearrow_forwardSperm are produced in the _______. a. scrotum b. seminal vesicles c. seminiferous tubules d. prostate glandarrow_forward
- Fertility specialists may advise a couple who wish to conceive a child to use an alkaline (basic) douche immediately before intercourse. What might the reasoning behind this advice be?arrow_forwardWhich 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_forwardSildenafil citrate (marketed under the name ‘Viagra’) causes increased blood flow into the penis, thus allowing for erection to occur. Explain the mechanism by which this drug accomplishes this? What hormone is primarily responsible for the Graafian follicle rupturing to release the oocyte at ovulation?arrow_forward
- A professional male athlete has been taking a synthetic testosterone supplement for several months. He and his wife have been trying to have a baby, with no success, and have decided to begin treatment for infertility. Before testing the man’s sperm, the doctor discovers that the man’s LH levels are very low. Why do you think his LH le count vels are low? Would low LH levels affect sperm production?arrow_forwardIdentify the structure that secretes the hormone involved in the development of the secondary male sex characteristics and contributes to spermatogenesis. Select one: a. D, which is the Sertoli cell b. A, which is the spermatocyte c. C, which is the sperm cell d. B, which is the interstitial cellarrow_forwardThe order of ducts in the male genital system: Select one: O a. Tubuli recti- Rete testis- Vasa efferentia- Ejacutatory duct b. Tubuli recti- Rete testis- Vasa efferentia- epididymis c. Rete testis- Tubuli recti- Vasa efferentia- epididymis d. Vasa efferentia- Ejacutatory duct- Epididymis O The connective tissue layer of a mucous membrane is named:arrow_forward
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