Listed in the table below are the five major reproductive hormones that support ovulation in female mammals, including the giant panda. Describe the role of each hormone in this process and the approximate time during the ovarian cycle that it reaches peak levels. Hormone Gonadotropin-releasing hormone (GnRH) Estrogen Luteinizing hormone (LH) Follicle stimulating hormone (FSH) Progesterone Role in Regulation of the Menstrual Cycle Timing of Peak Level

Listed in the table below are the five major reproductive hormones that support ovulation in female mammals, including the giant panda. Describe the role of each hormone in this process and the approximate time during the ovarian cycle that it reaches peak levels. Hormone Gonadotropin-releasing hormone (GnRH) Estrogen Luteinizing hormone (LH) Follicle stimulating hormone (FSH) Progesterone Role in Regulation of the Menstrual Cycle Timing of Peak Level

Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter21: Reproductive System

Section: Chapter Questions

Problem 4RQ

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Figure 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.
Outline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.
Figure 43.17 Which of the following statements about the menstrual cycle is false? Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle. Menstruation occurs just after LH and FSH levels peak. Menstruation occurs after progesterone levels drop. Estrogen levels rise before ovulation, while progesterone levels rise after.
What is the expected effect on reproduction on an individual with hormone levels shown above? Identify two physiological changes that will not occur due to the atypical hormone levels shown above. The graph below shows the estrogen and progesterone levels of an individual during a menstrual cycle of 28 days. The top light blue line indicates the progesterone levels and the bottom purple line indicates the estrogen levels. This individual is in luteal phase.This individual can be expected to have low levels of FSH and LH.
Which of the following statement correctly describe the role of androgen in the male reproductive system? Select one: A. LH stimulates the Sertoli cell to produce inhibin and to start spermatogenesis. B. Increased levels of inhibin released by the interstitial cells result in lower levels of FSH and testosterone. C. Increased levels of testosterone feedbacks negatively to the anterior pituitary and hypothalamus. D. GnRH is released by the anterior pituitary and stimulates the release of FSH and LH.
Which of the following mechanisms best explains the contraceptive effect of birth control pills that contain both synthetic estrogen and progestin? Inhibition of ovulation Impairment of implantation hyperplastic changes of the endometrium Production of uterine secretions that are toxic to developing embryos Impairment of sperm transport due to uterotubal obstruction Direct inhibition of oocyte maturation
All of the followings are correct about female reproductive system except----------------.A. At any one time, ovaries contain follicles and corpora lutea in various stages of developmentB. LH is secreted from Theca cells under the influence of GnRHC. FSH is secreted from the anterior pituitary glandD. Estrogen and FSH further stimulate granulosa cell differentiationE. Progesterone is secreted from the corpus Luteal cell
For each hormone, select whether the hormone is increasing or decreasing at the beginning of parturition. In addition, select the correct effect that the change in hormone secretion causes. Hormone Levels Resulting Effect Increasing Decreasing Causes the endometrial layer to break away from the uterus Causes the endometrial layer to be maintained Increases uterine contractions Decreases uterine contractions Increases milk production in the mother's breasts Decrease milk production in the mother's breasts Hormone Hormone Levels Resulting Effect Estrogen Progesterone Oxytocin Prostaglandins Prolactin
The endometrium thickens during the uterine cycle, but disintegrates if the egg is not fertilized. The disintegration and shedding of the endometrium is caused by a drop in progesterone levels an increase in estrogen levels by increase in human chorionic gonadotropin levels a drop in prolactin levels
Which of the following statements is NOT true concerning the hormonal control over the male reproductive system? These hormones are involved in a negative feedback relationship The hypothalamus secretes a hormone called gonadotropin-releasing hormone Luteinizing hormone controls the production of sperm in the seminiferous tubules Follicle-stimulating hormone and luteinizing hormone are present in both males and females The interstitial cells produce testosterone
At the midpoint of the menstrual cycle, estrogen promotes a sudden surge of LH from the pituitary. What would be the consequence of an endocrine disrupting chemical (EDC) in the environment that mimics estrogen and is present throughout the cycle? Group of answer choices pituitary hyperplasia (cell growth) cancer development uterine contractions ovulation would not occur cervical dilation
If 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) Progesterone