Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 49, Problem 16TYK
Summary Introduction
To review:
Drug design of a birth control drug that would prevent conception by interfering with fertilization.
Introduction:
Human fertilization is the union of a human egg and sperm, which occurs in the fallopian tube of a female. The result of fertilization is the production of a zygote cell, or fertilized egg. It occurs when sperm fuse into an ovum.
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combination birth control pills contain estrogen and progestin. A typical pill packet contains 3 weeks of active hormones and 1 week of placebo pills. During the week of placebo pills, menstruation occurs.
Use your knowledge of the hormonol control of the female reproductive system to:
1) Explain how the pills alter the feedback pathways of FSH and LH to prevent pregnancy.
2) Explain why menstruation occurs during the placebo week
In vitro fertilization (IVF) is a common assistive reproductive technology for couples who are struggling to conceive naturally; however, the success rate of IVF is, at best, about 55%. Researchers seeking to improve the success of IVF need to observe the interaction between sperm and eggs in order to better understand the factors that favour fertilization. Obviously, larger sperm and eggs would be easier to observe, even with the aid of microscopy. On this basis, which of the following vertebrate groups might be a good model for studying IVF because they are likely contain species with large sperm and eggs?
Group of answer choices
a) fish
b) amphibians
c) reptiles
d) birds
e) mammals
Previously, birth control methods involving hormones were created only for females. However, a new form of hormonal contraceptive has been developed for males. The contraceptive involves a monthly injection of the hormone testosterone. Testosterone injections showed a 99% efficacy in preventing pregnancy. Which of the following rows correctly identifies the expected levels for the hormones involved in the production of sperm and the hormone that stimulates the production of testosterone in a male receiving testosterone injections, respectively?
Select one:
a.
Sperm Production
Testosterone Production
Low FSH
Low LH
b.
Sperm Production
Testosterone Production
Low LH
Low FSH
c.
Sperm Production
Testosterone Production
High FSH
High LH
d.
Sperm Production
Testosterone Production
High LH
High FSH
Chapter 49 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 49.1 - Prob. 1SBCh. 49.2 - What are egg coats, and what is their function?...Ch. 49.2 - Prob. 2SBCh. 49.3 - Outline the roles of follicle-stimulating hormone...Ch. 49.4 - How does the oral contraceptive pill prevent...Ch. 49 - Prob. 1TYKCh. 49 - Which of the following processes does not increase...Ch. 49 - Prob. 3TYKCh. 49 - Prob. 4TYKCh. 49 - The slow block to polyspermy: a. is caused by a...
Ch. 49 - Prob. 6TYKCh. 49 - Prob. 7TYKCh. 49 - Prob. 8TYKCh. 49 - Prob. 9TYKCh. 49 - Prob. 10TYKCh. 49 - Prob. 11TYKCh. 49 - Prob. 12TYKCh. 49 - Prob. 13TYKCh. 49 - Prob. 14TYKCh. 49 - Prob. 15TYKCh. 49 - Prob. 16TYKCh. 49 - Prob. 17TYKCh. 49 - Prob. 18TYKCh. 49 - Prob. 1ITDCh. 49 - Prob. 2ITDCh. 49 - Prob. 3ITD
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- Name at least two potential confounding variables controlled by breastfeeding experiments.arrow_forwardHow do tubal ligations and vasectomies prevent further pregnancies? Select one: a. The corpus luteum and the epididymis are suppressed using a chemical swab. The fertilized egg could no longer implant in the endometrium. b. The Fallopian tubes and vas deferens are cut and tied off, thereby preventing the movement of the eggs and sperm. c. The Fallopian tubes and the vas deferens are cut. Eggs and sperm can no longer be produced. d. The Fallopian tube and vas deferens are cut and tied off, thereby reducing needed reproductive hormone levels.arrow_forwardDuring the early stages of family planning, a client asks their nurse how over the counter pregnancy tests work. The most appropriate explanation is that the pregnancy test detects the presence of _______ in the urine. Question 22 options: a) Gonadotropin releasing hormone (GnRH) b) Human chorionic gonadotropin (hCG) c) Progesterone d) Luteinizing hormone (LH)arrow_forward
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