The primary purpose of gonadotropin-releasing hormone (GnRH) is to stimulate the : Breakdown of the endometrium in the menstrual flow . Development of the woman's breasts for lactation . Secretion of follicle stimulating hormone (FSH) and luteinizing hormone (LH ) from the anterior pituitary gland . Growth of pubic and axillary hair .

The primary purpose of gonadotropin-releasing hormone (GnRH) is to stimulate the : Breakdown of the endometrium in the menstrual flow . Development of the woman's breasts for lactation . Secretion of follicle stimulating hormone (FSH) and luteinizing hormone (LH ) from the anterior pituitary gland . Growth of pubic and axillary hair .

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 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.
Conditions that cause the fallopian tubes to be narrower than normal may result in: Implantation of a fertilized ovum within the tube. More rapid propulsion of the ovum through the tube. Increased likelihood of pregnancy during each cycle. Excessive cramping and bleeding during menstruation .
What are the main effects of gonadotropic hormones? Select all that apply. Stimulation of the formation of the ova Stimulation of the secretion of hormones from sex Stimulation of the development of secondary female sexual characteristics Stimulation sustains pregnancy Stimulation of the hormone progesterone
Polycystic ovarian syndrome (PCOS) is an endocrine disorder. PCOS may result in irregular periods, elevated levels of male hormones, and enlarged ovaries with fluid filled sacs called cysts.Doctors may prescribe birth control pills containing only progesterone to help regulate periods and reduce symptoms.Progesterone plays an important role in the ovarian and uterine cycles. Describe the functions of progesterone during the cycle (at LEAST 2).
Polycystic ovarian syndrome (PCOS) is an endocrine disorder. PCOS may result in irregular periods, elevated levels of male hormones, and enlarged ovaries with fluid filled sacs called cysts.Doctors may prescribe birth control pills containing only progesterone to help regulate periods and reduce symptoms.Progesterone plays an important role in the ovarian and uterine cycles. Describe the functions of progesterone during the cycle.
Which of the following is/are true with regards to hormones in the reproductive tract? Estrogen secretion is stimulated exclusively by LH. Progesterone is secreted by ovarian follicles & the corpus luteum. Progesterone secretion is stimulated exclusively by FSH. Estrogen is secreted by ovarian follicles & the corpus luteum. All of the above
Hypogonadism is a condition where the body does not produce enough testosterone. The symptoms of hypogonadism include infertility and a decrease in secondary sex characteristics. There are two types of hypogonadism. Primary hypogonadism is caused by problems stemming from the testicles, and secondary hypogonadism is caused by problems stemming from the hypothalamus or the pituitary gland. Individuals with hypogonadism are often treated with testosterone replacement therapy. What would be the result of testosterone injections in individuals with hypogonadism? Select one: a. GnRH LH Testosterone Decrease Decrease Increase b. GnRH LH Testosterone Decrease Decrease Decrease c. GnRH LH Testosterone Increase Increase Increase d. GnRH LH Testosterone Increase Increase Decrease
Which of the following is/are true with regards hormones in the reproductive tract? * All the choices Progesterone is secreted by ovarian follicles & the corpus luteum. Estrogen secretion is stimulated exclusively by LH. Progesterone secretion is stimulated exclusively by FSH. Estrogen is secreted by ovarian follicles & the corpus luteum.
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
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
Which of the following is true regarding LH signaling in men? O Stimulates leydig cells to produce testosterone O Stimulates the sertoli cells to increase spermatogenesis O Stimulates the leydig cells to produce inhibin OStimulates the granulosa cells to increase spermatogenesis Stimulates the theca cells to produce testosterone
Polycystic ovarian syndrome (PCOS) is an endocrine disorder. PCOS may result in irregular periods, elevated levels of male hormones, and enlarged ovaries with fluid filled sacs called cysts.Doctors may prescribe birth control pills containing only progesterone to help regulate periods and reduce symptoms.Progesterone plays an important role in the ovarian and uterine cycles. Describe the levels of progesterone during an average 28-day cycle and explain why these levels occur.