Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Question
Chapter 26, Problem 5SQ
Summary Introduction
To explain: The reason FSH and LH hormones are inhibited after ovulation has occurred in the female cycle.
Concept introduction: The anterior pituitary gland secretes the follicle-stimulating hormone (FSH) and the luteinizing hormone (LH). FSH and LH are sex hormones. The FSH triggers the Graafian follicle growth in the ovary. The LH triggers ovulation phase in the ovary.
Summary Introduction
To explain: The female hormone that inhibits FSH and LH
Concept introduction: The anterior pituitary gland secretes the follicle-stimulating hormone (FSH) and the luteinizing hormone (LH). FSH and LH are sex hormones. The FSH triggers the Graafian follicle growth in the ovary. The LH triggers ovulation phase in the ovary.
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What are the organizing effects of sex hormones? Compare the negative feedback loops in the male reproductive system with those of the female’s reproductive cycle. Describe an example of positive feedback involving estrogen that leads to ovulation. What are the hormonal changes during the luteal phase of the menstrual cycle?
During the follocular phase of the ovarian cycle, what does an increase in estrogen concentrations correlate with?
1-The degradation of a follicle containing an egg(oocyte)
2-The formation of the corpus luteum
3-The maturation of a follicle containing an egg(oocyte)
4- The degradation of teh corpus luteum
Although the most effective form of an oral contraceptive for woman contain estrogen and progestin, some birth control pills contain a small dose of progestin-only. This is because there are many risks and side effects.
Which of the following statements is NOT a reason for using a progestin-only oral contraceptive?
Select one:
A. progesterone maintains the corpus luteum as corpus luteum release a large amount of progesterone and estrogen.
B. progesterone suppresses the maturation of follicles, thereby preventing ovulation of a mature ovum.
C. progestin-only oral contraceptives prevent the production of FSH and LH in the anterior pituitary.
D. progesterone suppresses the production of GnRH in the hypothalamus.
Chapter 26 Solutions
Campbell Essential Biology with Physiology (6th Edition)
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Similar questions
- 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.arrow_forwardMatch 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_forwardOutline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.arrow_forward
- Which hormone is inhibited during pregnancy in order to prevent contractions of the uterus? Which two hormones promote thickening of the endometrium? Progesterone and estrog If GnRH production were blocked, what will happen? What would happen if testosterone levels get too high?arrow_forwardWhich of the following describes the role of Luteinizing hormone in the ovarian cycle? o Inhibits the hypothalamus from secreting GNRH o Directly promotes thickening of the endometrium o Simulates the ovary to increase aldosterone o Induces the corpus luteum to secrete progesterone Stimulates lactation in the mammary glandsarrow_forwardWhat is a tissue or group of tissues that make and releases hormones Which hormones are found in the contraceptive pills? Which hormone promotes the thickening of the endometrium and also inhibits the hormone that promotes the development of the follicle wall into the corpus luteum?arrow_forward
- 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 Levelarrow_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_forwardHow do follicles influence FSH and LH levels at the end of the follicular phase, right before ovulation? Follicles release high quantities of estrogen, which result in a large increase in LH and a small increase in FSH O Follicles release high quantities of progesterone, which result in a large increase in LH and a small increase in FSH O Follicles release low quantities of estrogen, whch result in a large increase in LH O Follicles release low quantities of progesterone, which result in a large increase in LH and a small increase in FSHarrow_forward
- Based 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_forwardIs there a male equivalent to the sexual cycle observed in female? How does female physiology change during pregnancy? Include the specific changes to the organ systems.arrow_forwardWhy do anabolic steroids lead to reduced sperm counts?arrow_forward
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