HUMAN ANATOMY
6th Edition
ISBN: 9781260210262
Author: SALADIN
Publisher: RENT MCG
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Textbook Question
Chapter 4.3, Problem 14BYGO
Why is a baby more likely to be born with anatomical defects stemming from teratogen exposure at 30 days than from exposure at 10 days?
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Students have asked these similar questions
a) 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.
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?
What is a teratogen? Give an example.
Chapter 4 Solutions
HUMAN ANATOMY
Ch. 4.1 - Prob. 1BYGOCh. 4.1 - Prob. 2BYGOCh. 4.1 - Explain the functions of the sperm’s acrosome and...Ch. 4.1 - Describe two ways a fertilized egg prevents the...Ch. 4.2 - List the four primary tissue types of the adult...Ch. 4.2 - Oligohydramnios17 is an abnormally low volume of...Ch. 4.2 - Prob. 5BYGOCh. 4.2 - Prob. 6BYGOCh. 4.2 - Prob. 7BYGOCh. 4.2 - Prob. 8BYGO
Ch. 4.2 - Prob. 9BYGOCh. 4.2 - Prob. 10BYGOCh. 4.2 - Define and describe the neural tube, primitive...Ch. 4.3 - Prob. 1AWYKCh. 4.3 - Prob. 12BYGOCh. 4.3 - Prob. 13BYGOCh. 4.3 - Why is a baby more likely to be born with...Ch. 4 - Prob. 4.1.1AYLOCh. 4 - Prob. 4.1.2AYLOCh. 4 - Prob. 4.1.3AYLOCh. 4 - Prob. 4.1.4AYLOCh. 4 - Prob. 4.1.5AYLOCh. 4 - Prob. 4.1.6AYLOCh. 4 - Prob. 4.1.7AYLOCh. 4 - The duration of pregnancy and how the date of...Ch. 4 - Prob. 4.2.2AYLOCh. 4 - Prob. 4.2.3AYLOCh. 4 - Prob. 4.2.4AYLOCh. 4 - Prob. 4.2.5AYLOCh. 4 - Prob. 4.2.6AYLOCh. 4 - Prob. 4.2.7AYLOCh. 4 - Prob. 4.2.8AYLOCh. 4 - Prob. 4.2.9AYLOCh. 4 - The major changes that occur during the embryonic...Ch. 4 - Prob. 4.2.11AYLOCh. 4 - How the coelom forms, how it divides into the...Ch. 4 - The meaning of organogenesis, and some tissues and...Ch. 4 - Prob. 4.2.14AYLOCh. 4 - Prob. 4.2.15AYLOCh. 4 - Prob. 4.2.16AYLOCh. 4 - Prob. 4.2.17AYLOCh. 4 - Prob. 4.2.18AYLOCh. 4 - Prob. 4.2.19AYLOCh. 4 - The three modes in which the conceptus is...Ch. 4 - The development and mature structure of the...Ch. 4 - The relationship of the placenta to the umbilical...Ch. 4 - Prob. 4.2.23AYLOCh. 4 - The time at which the individual is considered to...Ch. 4 - Prob. 4.2.25AYLOCh. 4 - Prob. 4.3.1AYLOCh. 4 - Prob. 4.3.2AYLOCh. 4 - Prob. 4.3.3AYLOCh. 4 - Prob. 4.3.4AYLOCh. 4 - Prob. 4.3.5AYLOCh. 4 - Prob. 4.3.6AYLOCh. 4 - Prob. 4.3.7AYLOCh. 4 - When a conceptus arrives in the uterus, it is at...Ch. 4 - The entry of a sperm nucleus into an egg must be...Ch. 4 - Prob. 3TYRCh. 4 - Prob. 4TYRCh. 4 - Prob. 5TYRCh. 4 - Prob. 6TYRCh. 4 - Prob. 7TYRCh. 4 - Prob. 8TYRCh. 4 - Prob. 9TYRCh. 4 - For the first 8 weeks of gestation, a conceptus is...Ch. 4 - Viruses and chemicals that cause congenital...Ch. 4 - Prob. 12TYRCh. 4 - Prob. 13TYRCh. 4 - Prob. 14TYRCh. 4 - Prob. 15TYRCh. 4 - The enzymes with which a sperm penetrates an egg...Ch. 4 - Prob. 17TYRCh. 4 - Prob. 18TYRCh. 4 - Prob. 19TYRCh. 4 - Prob. 20TYRCh. 4 - Prob. 1BYMVCh. 4 - Prob. 2BYMVCh. 4 - Prob. 3BYMVCh. 4 - Prob. 4BYMVCh. 4 - Prob. 5BYMVCh. 4 - Prob. 6BYMVCh. 4 - Prob. 7BYMVCh. 4 - Prob. 8BYMVCh. 4 - Prob. 9BYMVCh. 4 - Prob. 10BYMVCh. 4 - Prob. 1WWWTSCh. 4 - Prob. 2WWWTSCh. 4 - Prob. 3WWWTSCh. 4 - Prob. 4WWWTSCh. 4 - Prob. 5WWWTSCh. 4 - Prob. 6WWWTSCh. 4 - Prob. 7WWWTSCh. 4 - Prob. 8WWWTSCh. 4 - Prob. 9WWWTSCh. 4 - Briefly explain why each of the following...Ch. 4 - Only one sperm is needed to fertilize an egg, yet...Ch. 4 - Prob. 2TYCCh. 4 - Prob. 3TYCCh. 4 - Prob. 4TYCCh. 4 - Prob. 5TYC
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- 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 trimesterarrow_forwardFactors that can cause congenital malformations by affecting an embryo during its periods of rapid growth and development are called teratogens. TRUE or FALSEarrow_forwardWhy is fetal Hb essential for the survival of placental animals?arrow_forward
- A woman has discovered she is pregnant. What should she avoid to reduce the risk of injuring the fetus or having a miscarriage?arrow_forwardDescribe the development of reproductive organs in a fetus of each gender. Which genes, gene products, and hormones are involved in the sex differences? Which sex- related hormones are circulating in high concentrations in a pregnant woman compared to a nonpregnant woman? Do these hormones cross the placenta (if you are uncertain, consider hormone chemical class relative to membrane permeability to make an educated guess)? Assuming these hormones do cross the placenta, how do they affect the hormonal environment inside the fetus, and how does this relate to fetal reproductive development?arrow_forwardUnlike some other types of birth defects, neural tube defects are largely preventable. Explainarrow_forward
- After birth, there is production and secretion of milk from the mother'smammary glands.a) Discuss the similarities and differences observed in the stages ofdevelopment of the adult breast tissue, specifically from the nonpregnant, to the pregnant and finally to the lactating stage.b) Why is it normally only after birth that lactogenesis occurs?arrow_forwardAlcohol 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_forwardhCG, estrogen and progesterone are hormones that are secreted throughout pregnancy. Answer the following questions about these hormones.1) Identify the structure that initially secretes hCG 2) Describe the function of hCG and identify the trimester where the hCG level is the highest 3) What are the roles of estrogen & progesterone in pregnancy 4) What structure initially secretes estrogen & progesterone? 5) What structure takes over the role of secreting hCG, estrogen & progesterone in the second and third trimesters?arrow_forward
- Question:- There are specific critical periods during fetal development in which any damage caused to the fetus from malnutrition or exposure to toxins is irreversible. When do these periods occur? a) 3rd trimester b) 1st trimester c) 2nd trimester d) only at week 12 e) there are no critical periodsarrow_forwardName and describe each of the three stages of prenatal development. Then go on to explain the possible impact of teratogens at each stage. Specifically, look at what structures are most likely to be impacted at each stage.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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