Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 29RQ
Some early experiments for male birth control pills used drugs that suppressed gonadotropin (FSH and LH) release. However, men given these drugs stopped taking them because the drugs decreased testosterone secretion, which decreased the men’s sex drive and caused impotence.
- a. Use the information given in Figure 7.9 to draw the GnRHFSH/LH-testosterone reflex pathway. Use the pathway to show how suppressing gonadotropins decreases sperm production and testosterone secretion.
- b. Researchers subsequently suggested that a better treatment would be to give men extra testosterone. Draw another copy of the reflex pathway to show how testosterone could suppress sperm production without the side effect of impotence.
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Chapter 7 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 7.1 - Name the membrane transport process by which...Ch. 7.1 - What is the suffix in a chemical name that tells...Ch. 7.2 - What is the classic definition of a hormone?Ch. 7.2 - Based on what you know about the organelles...Ch. 7.2 - Prob. 5CCCh. 7.2 - The steroid hormone aldosterone has a short...Ch. 7.3 - In the blood glucose example, the increase in...Ch. 7.3 - Which insulin release pathway in Figure 7.7b is a...Ch. 7.3 - Prob. 9CCCh. 7.3 - Catecholamines belong to which chemical class of...
Ch. 7.3 - What intracellular structure is used for transport...Ch. 7.3 - Prob. 12CCCh. 7.3 - Match the general reflex pathway patterns shown in...Ch. 7.3 - Prob. 14CCCh. 7 - The study of hormones is called _____.Ch. 7 - List the three basic ways hormones act on their...Ch. 7 - List five endocrine glands, and name one hormone...Ch. 7 - Match the following researchers with their...Ch. 7 - Put the following steps for identifying an...Ch. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQCh. 7 - Prob. 11RQCh. 7 - Why do steroid hormones usually take so much...Ch. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 16RQCh. 7 - In reflex control pathways involving trophic...Ch. 7 - What characteristic defines neurohormones?Ch. 7 - Prob. 19RQCh. 7 - Prob. 20RQCh. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Prob. 23RQCh. 7 - Prob. 24RQCh. 7 - Compare and contrast the three chemical classes of...Ch. 7 - Map the following groups of terms. Add terms if...Ch. 7 - The terms specificity, receptors, and...Ch. 7 - Prob. 28RQCh. 7 - Some early experiments for male birth control...Ch. 7 - Prob. 30RQCh. 7 - The following graph shows plasma TSH concentration...Ch. 7 - Prob. 32RQ
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- Which of the following statement does NOT describe the role of progesterone in the female reproductive system? Select one: A. Prevent the shedding of the endometrium B. Ensures that the endometrium is thick enough to support a fertilized egg C. Trigger the thickening of the endometrium D. Prevent smooth muscle construction, thereby preventing premature birtharrow_forwardWhich of the following statements correctly describes the effects of increased testosterone? a. Increased levels of testosterone result in increased sperm production b. Increased levels of testosterone decreases the release of FSH and LH c. Increased levels of testosterone stimulates the release of GnRH d. Increased levels of testosterone stimulates the release of FSH and LH.arrow_forwardWomen with inadequate secretion of GnRH are often treated for theirinfertility with drugs that mimic the action of this hormone. Why?arrow_forward
- According to the graph below, estrogen will reach its peak concentration prior to ovulation. Predict the concentration of the other hormones by choosing low, medium, or higharrow_forwardAccording to the graph below, estrogen will reach its peak concentration prior to ovulation. Predict the concentration of the other hormones by choosing low,medium, or high.arrow_forwardIf the ovum is not fertilized, the corpus luteum regresses, and the endometrium sloughs off to result in the first day of menstrual bleeding. The latter event would be duplicated, even if fertilization occurred, if receptors for which of the following hormones were occupied by an antagonist? A) Dehydroepiandrosterone B) Estradiol C ) Estriol D) Estrone E) Progesteronearrow_forward
- Which of the following statements does NOT describe the role of progesterone in the female reproductive system? a. Triggers the release of the ovum b. Prevents smooth muscle contraction, thereby preventing premature birth c. Prevents the shedding of the endometrium d. Ensures that the endometrium is thick enough to support a fetilized eggarrow_forwardBased on the schematic below, illustrating the control of the hypothalamus and the pituitary gland by the ovarian hormones, how would you design a hormonal female contraceptive that keeps secretion of FSH and LH low in order to prevent ovulation?arrow_forwardBirth control pills commonly provide excess progesterone that serves to inhibit (suppress) the actions of FSH and LH through a negative feedback loop. Given the role these hormones (FSH and LH) play, how could this feedback loop prevent a woman from becoming pregnant?arrow_forward
- How would mutations that completely ablate the function of the androgen receptor impact the phenotypic development of humans with XY chromosomes? a. Patients would appear phenotypically female. b. Patients would appear phenotypically male with underdeveloped secondary sex characteristics. c. Patients would appear phenotypically male, but cannot produce sperm. d. Patients would express both male and female secondary sex characteristics.arrow_forwardWhich of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estradiol 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 estradiol are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardDescribe the hormonal control of human male reproduction system with the help of a flow chart & highlight the inhibitory & stimulatory directions in it?arrow_forward
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