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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Textbook Question
Chapter 27, Problem 15RQ
Why do estrogen levels fall after menopause?
- The ovaries degrade.
- There are no follicles left to produce estrogen.
- The pituitary secretes a menopause-specific hormone.
- The cells of the endometrium degenerate.
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Normally deterioration of the endometrium begins when:
blood levels of FSH increase
blood levels of estrogen and progesterone decrease
blood levels of estrogen and progesterone increase
the corpus luteum secretes estrogen
Which 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 glands
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
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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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_forwardBesides producing gametes (sperm and eggs), the primary male and female reproductive organs also produce sex hormones. The _____ and the pituitary gland control secretion of both.arrow_forward
- How Is Sex Determined? The absence of a Y chromosome in an early embryo causes the: a. embryonic testis to become an ovary b. Wolffian duct system to develop c. Mllerian duct system to degenerate d. indifferent gonad to become an ovary e. indifferent gonad to become a testisarrow_forwardFigure 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.arrow_forwardRemoval of gonads cannot be considered as a contraceptive option. Why?arrow_forward
- 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?arrow_forwardWhich 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.arrow_forwardWhich 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 abovearrow_forward
- Which of the following events does NOT occur initially during a female reproductive cycle? * Progesterone promotes the secretory phase. FSH & LH stimulates development ovarian follicles& secretion of Estrogen. Estrogen promotes proliferative & secretory phases. FSH & LH stimulates development ovarian follicles & secretion of Progesterone. Hypothalamus release GNRH, which stimulates the Pituitary Gland to secrete FSH & LH.arrow_forwardWhich of the following events does NOT occur initially during a female reproductive cycle?" Progesterone promotes the secretory phase. FSH & LH stimulates development ovarian follicles& secretion of Estrogen. FSH & LH stimulates development ovarian follicles & secretion of Progesterone. Estrogen promotes proliferative & secretory phases. Hypothalamus release GnRH, which stimulates the Pituitary Gland to secrete FSH & LHarrow_forwardSpermatogenesis is cyclic and exhibits spermatogenic wave inside the seminiferous tubules. Which of the following factor contribute to the spermatogenic cycle/wave? Retinoic acid signaling in the testis. AR levels in Sertoli cells. Activin and inhibin levels within the seminiferous tubule. Androgen receptor (AR) levels in Leydig and peritubular cells. Testosterone levels in the lumen of the seminiferous tubules.arrow_forward
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