BIOLOGY
4th Edition
ISBN: 9781266739606
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 35, Problem 23WIO
What kinds of studies and information would be necessary to determine whether exposure to a potential teratogen can cause birth defects a year later? How would such an analysis differ if it were a man or a woman who was exposed?
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What kinds of studies and information are required to determine whether a man’s exposure to a potential teratogen can cause birth defects years later? How would such analysis differ if a woman were exposed?
Retinoic acid is the main component of Tretinoin, an anti-cancer chemotherapy drug. Retinoic acid is also a known teratogen which can cause congenital anomalies in eyes, ears, hearts, lungs, limbs, and many other organ systems. Based on the organ systems that are impacted by exposure to retinoic acid, during which of the following trimesters of pregnancy are developing humans most susceptible to the teratogenic effects of retinoic acid?
aFirst trimester
b.Second trimester
c.Third trimester
What is a teratogen? Give an example.
Chapter 35 Solutions
BIOLOGY
Ch. 35.1 - Prob. 1MCCh. 35.1 - Prob. 2MCCh. 35.1 - Prob. 3MCCh. 35.2 - Prob. 1MCCh. 35.2 - Prob. 2MCCh. 35.2 - Prob. 3MCCh. 35.2 - Prob. 4MCCh. 35.3 - Prob. 1MCCh. 35.3 - Prob. 2MCCh. 35.3 - How do hormones regulate the ovarian and menstrual...
Ch. 35.4 - Prob. 1MCCh. 35.4 - Prob. 2MCCh. 35.4 - Prob. 3MCCh. 35.5 - What are the events of fertilization?Ch. 35.5 - What are the relationships among the zygote,...Ch. 35.5 - What is implantation, and when does it occur?Ch. 35.5 - Prob. 4MCCh. 35.5 - Prob. 5MCCh. 35.5 - What are the events of the second and third...Ch. 35.5 - Prob. 7MCCh. 35.6 - Prob. 1MCCh. 35.6 - Prob. 2MCCh. 35.6 - Prob. 3MCCh. 35.7 - Prob. 1MCCh. 35.7 - Prob. 2MCCh. 35 - Prob. 1MCQCh. 35 - Which hormones play central roles in both male and...Ch. 35 - Prob. 3MCQCh. 35 - Why can't a fertilized polar body develop into a...Ch. 35 - Prob. 5MCQCh. 35 - Prob. 6MCQCh. 35 - What is the correct order of structures to develop...Ch. 35 - Prob. 8MCQCh. 35 - A baby born four weeks before its due date is most...Ch. 35 - A chemical that can cause a birth defect is a a....Ch. 35 - What is differentiation? How do protein gradients...Ch. 35 - Prob. 2WIOCh. 35 - Prob. 3WIOCh. 35 - Prob. 4WIOCh. 35 - What are the functions of LH and FSH in males and...Ch. 35 - Prob. 6WIOCh. 35 - Prob. 7WIOCh. 35 - Prob. 8WIOCh. 35 - Is each of the following cell types haploid or...Ch. 35 - Prob. 10WIOCh. 35 - Prob. 11WIOCh. 35 - What would happen if two sperm fertilized the same...Ch. 35 - Prob. 13WIOCh. 35 - Prob. 14WIOCh. 35 - Prob. 15WIOCh. 35 - Prob. 16WIOCh. 35 - Prob. 17WIOCh. 35 - Prob. 18WIOCh. 35 - Prob. 19WIOCh. 35 - Most physicians clamp and cut the umbilical cord...Ch. 35 - Prob. 21WIOCh. 35 - Prob. 22WIOCh. 35 - What kinds of studies and information would be...Ch. 35 - Review the Survey the Landscape figure in the...Ch. 35 - Add ovulation to the concept map. What hormonal...Ch. 35 - Prob. 3PITCh. 35 - Add the terms placenta, follicle, polar body,...
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- 10a) A female is exposed to a teratogen during the first and second month of pregnancy - before she even realizes she is pregnant. Which of the following birth defects might you expect to occur as a result? Defects of the eyes and ears Misformed or missing arms and/or legs Heart defects All of the above could possibly occur b) A female is exposed to a teratogen late in pregnancy, from the fourth month until birth. Which of the following birth defects might you expect to occur as a result? (Choose all that apply!) Heart defects Defects of the reproductive system Deformed or missing arms and/or legs Defects of the eyes and/or ears Learning disabilityarrow_forwardSuppose that in the near future, you are a prenatal care provider. In the most recent ultrasound checkup on the expecting mother, you unfortunately found that the fetus is suffering a neural tube defect in the form of anencephaly. Seeing as the mother is still in the 12th week of pregnancy or the 1st trimester, the pregnancy can still be terminated via medical means. How would you explain to the parents the situation they are in?arrow_forwarda) Describe the process of neuralation. b) Identify the germ layer from which the nervous system forms. c) Describe when in development neuralation occurs. d) Identify a teratogen that could affect the development of the brain during this stage of pregnancy.arrow_forward
- Which of the following rows correctly identifies the stage in development and the embryonic age most sensitive to teratogens, respectively? Select one: a. Stage Embryonic Age Fetus 6 to 40 weeks b. Stage Embryonic Age Embryo 6 to 12 weeks c. Stage Embryonic Age Embryo 0 to 9 weeks d. Stage Embryonic Age Fetus 9 to 16 weeksarrow_forwardDescribe two additional teratogens that are not frequently occurring. Try to find ones that are rare and/or unusual. One you have identified two, then be sure to discuss what are the potential side effects and risks to the developing fetus.arrow_forwardIt is no mystery how harmful a lot of environmental factors can be on a fetus nor is it misunderstood how important proper prenatal care is during pregnancy. Despite this, we have seen that many people do not receive the recommended care and children are still born with birth defects due to preventable teratogens. explain how you could reduce or eliminate these negative consequences.arrow_forward
- List a number of teratogens and how they impact prenatal development. Provide examples such as research experiments done on this.arrow_forwardA woman hoping to have a child took a home pregnancy test the day her period was due. Explain how should she interpret a negative test result and why.arrow_forwardHow should ‘pregnancy’ be defined? By formation of a unique embryo in the fallopian tubes or by implantation of an embrio in the uterus? Explain your answer by giving reasons. Consider implications of your view. (a) be written in clear, cohesive and grammatical English(b) address, in a straightforward way, the issue raised by the prompt.(c) contain a bare minimum of quoted material (* AT MOST 10% * of the total number of words of the assignment can be quotation)(d) be original work (not plagiarized). Please, remember that all papers are run through Turnitin software that checks for originality.arrow_forward
- Alcohol is the one of the most damaging teratogens, and it is also the easiest to avoid during pregnancy. It is unknown what the safe amount of alcohol consumption during pregnancy is. Therefore, it is recommended that pregnant and breastfeeding women do not consume any amount of alcohol to prevent fetal alcohol syndrome in newborns.Symptoms of the fetal alcohol syndrome include all of the following EXCEPT Select one: a. a lack of oxygen delivered to fetal lungs b. a smaller or absent corpus callosum c. a smaller birth weight, length, and head circumference d. a learning disability, personality disorder, and facial malformationarrow_forwardWhat happens if an oocyte combines with sperm? Describe the processes involved in implantation. Mention what is occurring, where it is occurring, and any significant hormones involved. How does the zygote make its way through the uterine tube? Women who smoke cigarettes have an increased risk of ectopic pregnancy because the chemicals they absorb paralyze cilia all through the body. Explain.arrow_forwardIdentify one disease, one drug, and an environmental hazard that is known to negatively impact prenatal development. Be sure to describe the specific impact of each teratogen.arrow_forward
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