EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 36, Problem 4TYU
Summary Introduction
Introduction:
LH (luteinizing hormone) and FSH (follicle stimulating hormone) are gonadotropins released in the body by the anterior pituitary. They stimulate the gonads (testes in males and ovaries in females) and thus play an important role in reproduction.
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Which of the following statements is TRUE about corpus luteum?
Which of the following statements about the menstrual cycle is false? a. Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle. b. Menstruation occurs just after LH and FSH levels peak. c. Menstruation occurs after progesterone levels drop. d. Estrogen levels rise before ovulation, while progesterone levels rise after.
The tissue presented is at what phase of menstrual cycle and affected by what ovarian
hormone?
a. Secretory phase; progesterone
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Chapter 36 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 36.1 - Prob. 1CCCh. 36.1 - Prob. 2CCCh. 36.1 - MAKE CONNECTIONS What examples of plant...Ch. 36.2 - Prob. 1CCCh. 36.2 - Why might using a hot tub frequently make it...Ch. 36.2 - Prob. 3CCCh. 36.2 - WHAT IF? If each vas deferens in a male was...Ch. 36.3 - Prob. 1CCCh. 36.3 - How does an estrous cycle differ from a menstrual...Ch. 36.3 - Prob. 3CC
Ch. 36.4 - Prob. 1CCCh. 36.4 - Prob. 2CCCh. 36.4 - Prob. 3CCCh. 36 - Prob. 1TYUCh. 36 - The cortical reaction of sea urchin eggs functions...Ch. 36 - Prob. 3TYUCh. 36 - Prob. 4TYUCh. 36 - Prob. 5TYUCh. 36 - Which of the following statements is true? A. All...Ch. 36 - For which is the number the same in males and...Ch. 36 - Prob. 8TYUCh. 36 - Prob. 9TYUCh. 36 - Prob. 10TYUCh. 36 - FOCUS ON EVOLUTION Hermaphroditism is more often...Ch. 36 - Prob. 12TYUCh. 36 - Prob. 13TYU
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- Nutrient and waste requirements for the developing fetus are handled during the first few weeks by _____. a. the placenta b. diffusion through the endometrium c. the chorion d. the blastocystarrow_forwardDuring the secretory phase of the menstrual cycle, endometrial glandssecretea. hormones that increase the likelihood of pregnancy.b. nutritive substances that sustain an embryo during the first 2 weeksof development.c. hormones that prevent ovulation.d. waste products into the lumen of the uterus.e. both a and c.arrow_forwardWhich of the following embryological events is involved in the formation of the ovarian follicles? a. Development of a genital tubercle in the cranial and the cloacal membrane b. Differentiation of the endoderm of the urogenital sinus c. Formation of longitudinal invaginations along the lateral aspect of the mesonephros d. Innervation of the ovary by neural crest cells e. Migration of the primordial germ cells from the yolk sacarrow_forward
- A. There is an increase of FSH at the beginning of the menstrual cycle. What causes it? B. There is a surge in E2 level before the ovulation. What causes it? C. There is a decrease of FSH before the ovulation. What causes it? D. There is a surge of LH and FSH that induces the ovulation. What causes the surge? E. There is a decrease of LH and FSH after ovulation. What causes it? F. There is a decrease in E2 after ovulation. What causes it? G. There is an increase of E2 and P4 a few days after the ovulation. What causes it? H. There is a decrease of E3 and P4 at the end of menstrual cycle. What causes it?arrow_forwardWhich of the following occurs during the follicular phase of the ovarian cycle? a. The secretory phase of the uterine cycle b. Estrogen secretion c. Progesterone secretion d. Degeneration of the corpus luteumarrow_forwardThe cause of menses in the uterine cycle appears to bea. increased progesterone secretion from the ovary, which producesblood clotting.b. increased estrogen secretion from the ovary, which stimulates themuscles of the uterus to contract.c. decreased progesterone secretion by the ovary.d. decreased production of oxytocin, causing the muscles of the uterusto relaxarrow_forward
- During the menstrual phase of the uterine cycle, a. estrogen and progesterone levels reach their highest concentrations. b. ovulation occurs. c. a pool of follicles begin to secrete estrogen. d. progesterone inhibits additional surges of luteinizing hormone.arrow_forwardAll of the following are characteristics of the uterine endometrium presented in the slide in the normal menstrual cycle EXCEPT a. Surface epithelium contains ciliated cells and secretory cells b. Glands are straight and contain many mitotic figures c. The tissue is under the influence of progesterone d. Lumens of glands contain secretions e. Basalis and functionalis layers are presentarrow_forwardMenopause is characterized primarily bya. primary ovarian failure.b. loss of estrogen secretion from the ovary due to a decrease in LH.c. loss of estrogen secretion from the ovary due to a decrease in FSH.d. a decrease in FSH and LH due to increased inhibin.e. a decrease in FSH and LH due to a decrease in GnRH pulses.arrow_forward
- During the first trimester, hCG produced from the chorion maintains the corpus luteum. What is the purpose of maintaining the corpus luteum? Select one: a. The corpus luteum produces relaxin, which thickens the endometrium. b. The corpus luteum ensures that the endometrium does not break down during the first trimester. c. The corpus luteum supports the formation of the placenta. d. The chorion forms the fetal part of the placenta, and the corpus luteum supports the maternal part of the placenta.arrow_forwardSerum estrogen concentration peaks at which of the following times during the menstrual cycle? a. At the beginning of endometrial proliferation b. Just after the onset of menses c. Just after ovulation d. Just prior to the increase in serum luteinizing and follicle-stimulating hormone concentrationsarrow_forwardProvides support and nourishment for the spermatids A. Labia majora B. Clitoris C. Sertoli D. Vulva E. Greater vestibular glandsarrow_forward
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