HUMAN BIOLOGY W MASTERING BIOLOGY
15th Edition
ISBN: 9781323510803
Author: Johnson
Publisher: PEARSON C
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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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The stage of prenatal development in which there is rapid growth and all of the organ systems are fully functional is referred to as the
a.)first trimester
b.)second trimester
c.)third trimester
d.)zygote phase
Which of the following is required for successful fetal development after the egg has been fertilized?
a) That the corpus luteum remains throughout the pregnancy
b) Production of estrogen (estradiol) and progesterone from the placenta
c) Release of hCG (human chorionic gonatotropin) from the placenta
Which of the following statements is NOT correct about the umbilical cord?
a. The umbilical cord is formed from the yolk sac and the allantois.
b. The umbilical cord is formed from the chorion.
c. The umbilical cord consists of two arteries and one vein.
d. The placenta connects to the embryon via the umbilical cord.
Chapter 21 Solutions
HUMAN BIOLOGY W MASTERING BIOLOGY
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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- Nutrient and waste requirements for the developing fetus are handled during the first few weeks by _____. a. the placenta b. diffusion through the endometrium c. the chorion d. the blastocystarrow_forward___________ removes webs between developing digits. a. Gastrulation c. Apoptosis b. Lactation d. Implantationarrow_forwardDefine and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forward
- Describe the three stages of prenatal development.arrow_forwardThe 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_forwardWhat is the common first sign of puberty in girls? A) Menarche B) Development of pubic hair C) Breast development D) Growth spurtarrow_forward
- Which of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veinsarrow_forwardHow does folate deficiency affect fetal development? A. It does not affect fetal development B. It increases the health of the fetus C. It can cause birth defects D. It helps the fetus to develop fasterarrow_forwardDuring the embryonic developmen, the trophoblast will developed into Select one: A. The embryonic disc B. The chorion C. The amnion and amniotic cavity D. The yolk sacarrow_forward
- The birth starts thanks to increased ... ... release of glucocorticoids from the fetus. ... stretching of the uterine muscles. ... release of oxytocin. ... release of estrogen from the placenta.arrow_forwardWhich 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 developmentarrow_forwardThe surface that enables active and passive exchange between the fetal and maternal bloodstreams is the (a) yolk stalk. (b) chorionic villi. (c) umbilical veins. (d) umbilical arteries.arrow_forward
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