Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214114
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Chapter 23, Problem 8LTB
Summary Introduction
Introduction:
In the ovary, the ovum is surrounded by hormone-secreting cells that together comprise the follicle. The ovarian follicle secrets estrogen which provides positive feedback on the hypothalamus to secret hormone-like LH and FSH. The hormone LH shows an important role in ovulation. The ovulation is a mechanism where mature ovum release from the ovary comes to the fallopian tube for fertilization.
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Describe the development of an oocyte from primordial follicle to when it is released at ovulation. How do hormones contribute to this progression? Describe the development of a spermatogonia to a spermatozoa. How do hormones contribute to this progression? What is the function of Sertoli and Leydig cells?
If fertilization occurs, the corpus luteum continues to produce hormones under the direction of Human Chorionic Gonadotrophin (HCG), which is produced by the embryo. By the third month, what begins to produce estradiol and progesterone?
At the end of the uterine cycle, there is a significant drop in the levels of LH, estrogen, and progesterone.This causes all of the following EXCEPT
Select one:
a. an increase in smooth muscle contractions of the uterus
b. the start of menstruation, which breaks down the blood vessels and tissues formed during the follicular stage
c. the maintenance of the corpus luteum to continue producing low levels of progesterone and estrogen
d. a negative feedback loop to the pituitary to secrete more FSH and LH
Chapter 23 Solutions
Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
Ch. 23 - Why can two cells with the same DNA have different...Ch. 23 - Prob. 2LTBCh. 23 - Add labels to the figure that follows, which...Ch. 23 - Prob. 4LTBCh. 23 - Prob. 5LTBCh. 23 - Prob. 6LTBCh. 23 - Which hormone helps prepare the uterus for...Ch. 23 - Prob. 8LTBCh. 23 - Prob. 9LTBCh. 23 - Prob. 10LTB
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- Ovulation releases _________. a. the corpus luteum b. a primordial follicle c. a primary oocyte d. a secondary oocyte and first polar bodyarrow_forwardIn the fertility awareness method of birth control, a woman gauges her monthly fertile period by monitoring changes in the consistency of her vaginal mucus. What kind of information does such a method provide about the likelihood of getting pregnant?arrow_forwardDescribe the events in the ovarian cycle leading up to ovulation.arrow_forward
- Distinguish between: a. seminiferous tubule and vas deferens b. sperm and semen c. Leydig cells and Sertoli cells d. primary oocyte and secondary oocyte e. follicle and corpus luteum f. the three phases of the menstrual cyclearrow_forwardOutline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.arrow_forwardIn cryptorchidism, one or both testes of an infant have not descended into the scrotal sac by the first birthday. In these cases, the testes are surgically descended. Why must the testes be descended if the later fertility of the child is to be maintained?arrow_forward
- At the end of the uterine cycle, there is a significant drop in the level of LH, estrogen, and progesterone. This causes all of the following EXCEPT Select one: A. The maintenance of the corpus luteum to continue producing low levels of progesterone and estrogen. B. The start of menstruation, which breaks down the blood vessels and tissues formed during the follicular stage. C. Negative feedback loop to the pituitary to secrete more FSH and LH. D. An increase in smooth muscle contractions of the uterus.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_forwardDefine ovumarrow_forward
- List three ways in which oogenesis differs from spermatogenesis. Be specific!arrow_forwardDescribe the process of ovulation, the hormone involved and what is released into the Fallopian tube (It isn’t just the oocyte) . At what stage of meiosis is the secondary oocyte? What is the life expectancy of the secondary oocyte?arrow_forwardDuring gametogenesis, from a single germ cell (oocyte/spermatocyte), males produce O4;1 O 4;4 O 1;1 O 1;4 gamete(s) and females producearrow_forward
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