Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 21, Problem 8TY
Summary Introduction
Introduction:
Prenatal development is the process that involves the development of the embryo into the fetus during the gestation period. The process of prenatal development begins with the fertilization and persists until the birth of an infant.
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All of the following events occur by the end of the eighth week of gestation EXCEPT
Select one:
a. the limb buds form distinct fingers and toes, and the face can be seen
b. the heart begins to pump, and red blood cells are formed in the liver
c. the reproductive structures have formed, and the gender of the baby can be determined through ultrasound
d. lungs and kidneys have formed
Identify a characteristic of a fetus in the sixth month of gestation.
a. It weighs between 5 and 7 pounds.
b. It can open and close its eyes and look in all directions.
c. It has fully developed reflex patterns.
d. It has a respiratory system that is adequate to survive outside the womb.
Which of the following statements regarding prenatal development risks is FALSE?
a. Cigarette smoking by women has serious adverse effects on prenatal and child development
b. Paternal factors can adversely affect prenatal development
c. Maternal nutritionplays little role in prenatal development
Chapter 21 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 21 - Prob. 1QCCh. 21 - Prob. 2QCCh. 21 -
1. Why does only one sperm fertilize the egg, and...Ch. 21 - Prob. 2CRCh. 21 - Prob. 3CRCh. 21 - Describe the stages of labor and delivery.Ch. 21 - What causes the newborn to take its first breath...Ch. 21 - Prob. 6CRCh. 21 - What causes the onset of puberty (sexual...Ch. 21 - Summarize the three main hypotheses of the causes...
Ch. 21 - Prob. 9CRCh. 21 - Prob. 10CRCh. 21 - Which of the following lists the correct order of...Ch. 21 - Which of the following will result in fraternal...Ch. 21 -
3. Which of the following processes is the first...Ch. 21 - Prob. 4TYCh. 21 - Prob. 5TYCh. 21 - Prob. 6TYCh. 21 -
7. Which of the following is mismatched?
a....Ch. 21 - Prob. 8TYCh. 21 - Prob. 9TYCh. 21 -
10. Which of the following would be detrimental...Ch. 21 - Prob. 11TYCh. 21 - Prob. 12TYCh. 21 - Prob. 13TYCh. 21 - Prob. 14TYCh. 21 - Which hormone plays a critical role both in...Ch. 21 - Prob. 1AWKCh. 21 - Prob. 2AWKCh. 21 - Prob. 3AWKCh. 21 - Each year, it is estimated that over 40,000...Ch. 21 - Prob. 5AWKCh. 21 - Prob. 6AWKCh. 21 - How is it possible that one's life could be...
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- The timing of puberty can be influenced by which of the following? a. genes b. stress c. amount of body fat d. all of the abovearrow_forwardWhich developmental stage is mismatched? a. second week—implantation b. third week—heart development begins c. fourth and fifth week—limb buds appear d. sixth through eighth week—all organ systems present e. None of these stages are mismatched.arrow_forwardMonths pass as Ashley has an uneventful pregnancy. Eventually, Ashley goes into labor and arrives at the hospital to give birth. As Ashley progresses through the first stage of labor, all of the following occur except a. the fetus’s head pushes against the cervix, promoting the cervical dilation. b. oxytocin levels decrease as labor progresses. c. the amniotic sac may rupture. d. contractions become more frequent and more intense.arrow_forward
- During the embryonic development, the trophoblast will develop into Select one: a. the yolk sac b. the amnion and amniotic cavity c. the chorion d. the embryonic discarrow_forwardWhat 2 ways can delivery of the placenta be managed during the 3rd stage? Select one or more: a. Conservative management b. Physiological management c. Active managementarrow_forwardComponent of bilaminar germ disc: a.Hypoblast and endoderm b.Epiblast and hypoblast c.Epiblast and ectoderm d.Ectoderm and mesodermarrow_forward
- Which structures are responsible for maintaining levels of estrogen earlier and later in pregnancy? a "corpus luteum earlier, placenta later" b "uterus earlier, ovaries later" c "placenta earlier, umbilical cord later" d "placenta earlier, ovaries later"arrow_forwardAnna is currently 10 weeks pregnant. It is her first pregnancy. She has very mixed feelings about her pregnancy. While she is happy about it, she is very scared and she does not have much knowledge of what the process entails. A. Discuss with Anna the 3 general risk factors in pregnancy B. Discuss the current period of development that is currently ongoing with the pregnancy. C. Using the stages, briefly explain what usually occurs during labour and delivery. D. Using the biopsychosocial framework, describe how the various forces can influence Anna’s decision on whether or not she would be breastfeeding her child.arrow_forwardGastrulation does NOT Select one: a. involve the formation of germ layers b. consist of endoderm, mesoderm, and ectoderm c. result in the formation of a third layer in the embryonic disk d. include the differentiation of cells into tissues and organsarrow_forward
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