Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 50, Problem 7TYU
Summary Introduction
Introduction: Contraception is a prevention method in which attempts are made to prevent conception. Any device that allows intercourse to occur but reduces the rate of conception is considered to be a device for contraception. There are many forms of contraception that interfere with different steps in the process of becoming pregnant.
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Chapter 50 Solutions
Biology (MindTap Course List)
Ch. 50.1 - Prob. 1LOCh. 50.1 - Distinguish among budding, fragmentation, and...Ch. 50.1 - Prob. 2CCh. 50.2 - Relate the structure of each organ of the human...Ch. 50.2 - Trace the passage of sperm cells through the human...Ch. 50.2 - Prob. 4LOCh. 50.2 - Prob. 1CCh. 50.2 - Prob. 2CCh. 50.2 - Prob. 3CCh. 50.2 - Prob. 4C
Ch. 50.3 - Prob. 5LOCh. 50.3 - Trace the development of a human egg and trace its...Ch. 50.3 - Describe the endocrine regulation of reproduction...Ch. 50.3 - Prob. 1CCh. 50.3 - Prob. 2CCh. 50.3 - Prob. 3CCh. 50.4 - Prob. 8LOCh. 50.4 - Prob. 1CCh. 50.4 - Prob. 2CCh. 50.4 - Which hormones most affect the birth process? What...Ch. 50.5 - Prob. 9LOCh. 50.5 - Prob. 1CCh. 50.6 - Prob. 10LOCh. 50.6 - Prob. 1CCh. 50.6 - Prob. 2CCh. 50.6 - Prob. 3CCh. 50.7 - Prob. 11LOCh. 50.7 - Prob. 1CCh. 50.7 - Prob. 2CCh. 50 - Hermaphroditism (a) is a form of asexual...Ch. 50 - Prob. 2TYUCh. 50 - Prob. 3TYUCh. 50 - Prob. 4TYUCh. 50 - Prob. 5TYUCh. 50 - Test Your Understanding 6 After ovulation, the...Ch. 50 - Prob. 7TYUCh. 50 - Prob. 8TYUCh. 50 - Prob. 9TYUCh. 50 - Test Your Understanding 10 Which sequence best...Ch. 50 - Prob. 11TYUCh. 50 - Test Your Understanding 12 INTERPRET DATA Examine...Ch. 50 - Test Your Understanding 13 EVOLUTION LINK Contrast...Ch. 50 - Prob. 14TYUCh. 50 - Test Your Understanding 15 SCIENCE, TECHNOLOGY,...Ch. 50 - Test Your Understanding 16 SCIENCE, TECHNOLOGY,...
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- Test Your Understanding 13 EVOLUTION LINK Contrast the biological advantages of hermaphroditism that involves cross-fertilization with hermaphroditism that involves self-fertilization.arrow_forwardTest Your Understanding 12 INTERPRET DATA Examine Figure 50-14. Which hormones are present in largest concentration just before ovulation? During which part of the menstrual cycle is the endometrium most prepared to receive an embryo? Which hormones stimulate thickening of the endometrium? Gonadotropic hormones and ovarian hormones regulate the monthly sequence of events that take place within the ovary and uterus. The preovulatory phase begins with menstruation; the postovulatory phase begins after ovulation. Figure 50-14 Endocrine regulation of the menstrual cycle When fertilization does not occur, the menstrual cycle repeats about every 28 days. Note the changes in hormone concentrations that regulate the menstrual cycle. (FSH, follicle-stimulating hormone; LH, luteinizing hormone) PREDICT What happens when a. womans ovaries produce a very low amount of estrogen?arrow_forwardMost contraceptive pills are designed for the female reproductive system. In a scientific innovation challenge, you are to present an idea for the development of a contraceptive pill for males. From your knowledge of the reproductive and endocrine systems of the male body, tell us how this pill when taken by a male will work to prevent pregnancy.arrow_forward
- 3. Fertilization of the egg in the upper part of the oviduct has álways thought to Be a means less fit, unable to complete the journey. However, recent evidence has showed that sperm actually 'help' each other during the ascent by locking and pulling other sperm along towards the egg. Describe an alternative hypothesis for fertilization in the upper oviduct to the 'most fit sperm' hypothesis and how would you provide evidence? 4. Hormone-based birth control methods deliver synthetic versions of progesterone in high concentrations or estradiol and progesterone in high concentrations. Propose a model as to how this action might prevent unwanted pregnancies? 5. In the recent past, the placenta, which is delivered after the birth of a fetus, was discarded as invaluable. Today, millions of dollars are being grantearrow_forwardWhich of the following cells is haploid? (a) primary oocyte (b) secondary oocyte (c) oogonium (d) cells of the corpus luteum (e) follicle cellarrow_forwardThe cells marked in the photomicrograph (A) contain the enzyme 'aromatase' (B) contain the enzymes 'P450scc' and '5-alpha-reductase' (C) demonstrate receptors for follicle-stimulating hormone (D) A and B (E) B and Carrow_forward
- 10. Researchers have discovered a new compound that is a candidate for birth control. Its proposed mechanism is to be a progesterone receptor agonist meaning that it binds and activates receptors that would normally recognize progesterone. Researchers are interested in understanding the efficacy of the new compound, in other words, how well does its progesterone receptor agonist activity prevent the possibility of pregnancy. Assume that we are working in a rodent model system (mouse or rat) and propose a research design to test the efficacy of this compound. This design needs to address the proposed mechanism that this compound is a progesterone receptor agonist. Include a description of the variables in the experiment, the treatment groups, the procedure to detect the efficacy of the proposed mechanism, and an explanation of the results that would be required to confirm the efficacy of this compound for birth control. D. Focus 五arrow_forwardThe most widely used hormonal methods of birth control: a. prevent fertilization by killing sperm b. prevent ovulation by inhibiting release of FSH and LH c. prevent implantation into the endometrium d. block transport of fertilized egg to uterusarrow_forwardWhich of the following statements about reproduction in humans is correct? (a) Fertilisation takes place externally. (b) Fertilisation takes place in the testes. (c) During fertilisation egg moves towards the sperm. (d) Fertilisation takes place in the human female.arrow_forward
- In humans, the development of fertilised egg takes place in the: (a) ovary (b) testis (c) oviduct (d) uterusarrow_forwardQ1. Ella accidentally ingests the poison tetrodotoxin from the pufferfish, which you know blocks voltage-gated Na+ channels. Predict the symptoms Albert will experience from this poisoning. Q2. What type of sexual dysfunction might arise in men taking drugs that inhibit sympathetic nervous system activity as part of the treatment for high blood pressure? Q3. How might the female orgasm increase the chance for fertilization to occur? Q4. Explain why oral contraceptives, which artificially raise levels of estrogens and progesterone, prevent pregnancy. Q5. Diazepam is a drug that stimulates the activity of GABA receptors in the brain. If a person was having an epileptic seizure, how would diazepam affect the seizure? Q6. During a surgical procedure, an anesthesiologist administers to the patient an inhaled anesthetic agent that opens Cl- channels in the postsynaptic membranes of neurons of the brain. Explain why this would put the patient “to sleep” for the duration of the surgical…arrow_forward(a) (b) S (c) 1960 WED TUE THU FRI SAT SUN MON Figure 19.16 Devices and substances used for birth control include (a) male and female condoms, (b) spermicide in film, sponge, suppositories, and gel, (c) oral contraceptives, and (d) a copper IUD. (a. d): McGraw-Hill Education/Jill Braaten, photographer: (b): ⒸPhotoLink/Getty Images RF: (c): Ⓒ Don Farrall/Getty Images RF Which of these methods of birth control uses hormones to prevent pregnancy? Answer can be found in Appendix F. (d)arrow_forward
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