Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 43, Problem 3VCQ
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.
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Put each of the following into the category it belongs with respect to the menstrual cycle.
Time between
menstruation and
ovulation
Corpus luteum
develops
Period of time
when fertilization is
most likely to occur
Menses or
menstrual bleeding
occurs
Endometrium
produces
secretions
LH surge occurs
Endometrium
rapidly increases in
cell number
Days 1-5 of the
cycle
Mature (Graafian)
follicle forms
Days 6-13
Days 15-28
Discharge of blood
and part of the
endometrium
Proliferative Phase
Secretory Phase
Menstrual Phase
Spermatogenesis 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.
The increased release of progesterone by the corpus luteum inhibits (decreases) the release of FSH and LH. Based on your knowledge of the menstrual cycle, what will be the effect of this feedback loop?
Chapter 43 Solutions
Biology 2e
Ch. 43 - Figure 43.8 Which of the following statements...Ch. 43 - Figure 43.15 Which of the following statements...Ch. 43 - Figure 43.17 Which of the following statements...Ch. 43 - Which form of reproduction is thought to be best...Ch. 43 - Which form of reproduction can result from damage...Ch. 43 - Which form of reproduction is useful to an animal...Ch. 43 - Genetically unique individuals are produced...Ch. 43 - External fertilization occurs in which type of...Ch. 43 - Which term applies to egg development within the...Ch. 43 - Which term applies to egg development outside the...
Ch. 43 - Sperm are produced in the______ scrotum seminal...Ch. 43 - Most of the bulk of semen is made by the...Ch. 43 - Which of the following cells in spermatogenesis is...Ch. 43 - Which female organ has the same embryonic origin...Ch. 43 - Which female organ has an endometrial lining that...Ch. 43 - How many eggs are produced as a result of one...Ch. 43 - Which hormone causes Leydig cells to make...Ch. 43 - Which hormone causes FSH and LH to be released?...Ch. 43 - Which hormone signals ovulation? FSH LH inhibin...Ch. 43 - Which hormone causes the regrowth of the...Ch. 43 - Nutrient and waste requirements for the developing...Ch. 43 - Progesterone is made during the third trimester by...Ch. 43 - Which contraceptive method is 100 percent...Ch. 43 - Which type of short term contraceptive method is...Ch. 43 - Which hormone is primarily responsible for The...Ch. 43 - Major organs begin to develop during which part of...Ch. 43 - Which of the following is false? The endoderm,...Ch. 43 - During cleavage, the mass of cells: increases...Ch. 43 - Which of the following gives rise to the skin...Ch. 43 - The ribs form from the ___________ . notochord...Ch. 43 - Why is sexual reproduction useful if only half the...Ch. 43 - What determines which sex will result in offspring...Ch. 43 - What are the advantages and disadvantages of...Ch. 43 - Why would paired external fertilization be...Ch. 43 - Describe the phases of the human sexual response.Ch. 43 - Compare spermatogenesis and oogenesis as to timing...Ch. 43 - If male reproductive pathways are not cyclical,...Ch. 43 - Describe the events in the ovarian cycle leading...Ch. 43 - Describe the major developments during each...Ch. 43 - Describe the stages of labor.Ch. 43 - What do you think would happen if multiple sperm...Ch. 43 - Why do mammalian eggs have a small concentration...Ch. 43 - Explain how the different germ layers give rise to...Ch. 43 - Explain the role of axis formation in development.
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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.arrow_forwardFigure 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_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
- Which is the correct order for one turn of the menstrual cycle? a. corpus luteum forms, ovulation, follicle forms b. follicle grows, ovulation, corpus luteum formsarrow_forwardFigure 43.8 Which of the following statements about the male reproductive system is false? The vas deferens carries sperm from the testes to the penis. Sperm mature in seminiferous tubules in the testes. Both the prostate and the bulbourethral glands produce components of the semen. The prostate gland is located in the testes.arrow_forwardOvulation releases _________. a. the corpus luteum b. a primordial follicle c. a primary oocyte d. a secondary oocyte and first polar bodyarrow_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_forwardOutline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.arrow_forwardList four events that are triggered by the surge of LH at the midpoint of the menstrual cycle.arrow_forward
- Which of the following statements is/are NOT true with regards the mammary gland? Lactiferous ducts are found all around the nipple. All the choices None of the choices Mammary glands are modified sudoriferous glands. It is responsible for milk production. Which of the following is NOT a mechanism for regulation of hormonal secretion in the female reproductive system? None of the choices Progesterone decreases secretion of GnRH and LH. All the choices Estrogen release Decreases secretion GnRH, FSH & LH. Inhibin results in decreased secretion of FSH and LH. Which of the following is the GREATEST in terms of number? Number of sperm produced from one spermatid Number of chromosomes in a spermatid Number of sperm produced from a single spermatogonium Length in inches…arrow_forwardWhich 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 testosteronearrow_forwardListed 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_forward
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