Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 18, Problem 11RQ
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 blastocyst
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The foramen ovale causes the fetal circulatory system to bypass the ________. a. liver b. lungs c. kidneys d. gonads
During the first 48-72 hours after birth, the breasts produce ________, a substance rich in protein and immunoglobulins which helps the baby adjust to a non-sterile environment.
Group of answer choices
a.endolymph
b.colostrum
c.meconium
d.amniotic fluid
1. A placenta vera is formed if
a.The placenta is removed during birth.
b. The maternal blood bathes the chorionic villi.
c. The epithelium of the decidua is not penetrated by the chorion.
d. The binucleated chorionic cells penetrate the decidual epithelium.
2. Which of the following does NOT occur during decidualization?
a. endometrial capillaries dilate and form sinusoids
b. syncytiotrophoblast extend further and form chorionic villi
c. endometrial stromal cells accumulate glycogen and lipids
d. syncytiotrophoblast is eroded and lacunae are filled with maternal blood
3. Which of the following reasons justifies the midblastula transition?
a. The yolk at the vegetal pole slows down the cleavage divisions.
b. The embryo has already completed the requirements for initial cleavage.
c. The embryo needs to replenish transcripts after using its maternal reserves.
d. The embryo needs to replenish its energy after several rounds of fast…
Chapter 18 Solutions
Concepts of Biology
Ch. 18 - Figure 18.12 Which of the following statements...Ch. 18 - Figure 18.17 Which of the following statements...Ch. 18 - In which group is parthenogenesis a normal event?...Ch. 18 - Genetically unique individuals are produced...Ch. 18 - External fertilization occurs in which type of...Ch. 18 - The process of gastrulation forms the _______. a....Ch. 18 - Which of the following gives rise to the skin...Ch. 18 - Sperm are produced in the _______. a. scrotum b....Ch. 18 - Which female organ has an endometrial lining that...Ch. 18 - Which hormone causes FSH and LH to be released? a....
Ch. 18 - Nutrient and waste requirements for the developing...Ch. 18 - Which hormone is primarily responsible for the...Ch. 18 - What might be a disadvantage to...Ch. 18 - Compared to separate sexes and assuming...Ch. 18 - What do you think would happen if multiple sperm...Ch. 18 - Compare spermatogenesis and oogenesis as to timing...Ch. 18 - Describe the events in the ovarian cycle leading...Ch. 18 - Describe the stages of labor.
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 1. A placenta vera is formed if a.The placenta is removed during birth. b. The maternal blood bathes the chorionic villi. c. The epithelium of the decidua is not penetrated by the chorion. d. The binucleated chorionic cells penetrate the decidual epithelium. 2. Which of the following does NOT occur during decidualization? a. endometrial es dilate and form sinusoids b. syncytiotrophoblast extend further and form chorionic villi c. endometrial stromal cells accumulate glycogen and lipids d. syncytiotrophoblast is eroded and lacunae are filled with maternal blood 3. Which of the following reasons justifies the midblastula transition? a. The yolk at the vegetal pole slows down the cleavage divisions. b. The embryo has already completed the requirements for initial cleavage. c. The embryo needs to replenish transcripts after using its maternal reserves. d. The embryo needs to replenish its energy after several rounds of fast division.arrow_forwardBlood islands are ________.a. clusters of blood-filtering cells in the placentab. masses of pluripotent stem cells scatteredthroughout the fetal bone marrowc. vascular tubes that give rise to the embryonictubular heart d. masses of developing blood vessels and formedelements scattered throughout the embryonic discarrow_forward1. Embryonic development occurs during this period. A. from the ninth week of gestation to birth B. from fertilization to implantation C. from implantation to the end of the eighth week of gestation D. from conception to birth 2. Part of the gastrulation phase includes the formation of germ layers that will... A. go on to form the placenta. B. form the ectoderm, mesoderm, and endoderm that will become specific tissues and organs. C. spread disease. D. produce the amniotic fluid.arrow_forward
- Which of the following condition will lead to a small- for -gestational -age fetus due to less blood supply to the fetus? * O A. Diabetes in the mother. B. Maternal cardiac condition. O C. Premature labor. D. Abruptio placenta.arrow_forwardWhich of the following structure develops into only the fetus? A. Blastocyte B. Zygote C. Trophoblast D. Inner cell massarrow_forwardFetal urine accumulates in the and contributes to the fluid there. a. placental sinus b.yolk sac C. allantois d. chorion e. amnionarrow_forward
- In the placenta, maternal blood is continuously pumped through the A. Umbilical arteries B. Chorionic villi C. Fetal vessels D. Intervillous spacearrow_forwardThe placenta is formed from ________.a. the embryo’s mesenchymal cellsb. the mother’s endometrium onlyc. the mother’s endometrium and the embryo’schorionic membraned. the mother’s endometrium and the embryo’sumbilical cordarrow_forwardThe outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the a. amnion. b. yolk sac. c. cembryoblast. d. trophoblast.arrow_forward
- Months 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_forwardWhich of the following is not a risk factor fon preterm delivery() A. Congenital malfermation with uterus B. Placenta previa C. Cervix insufficiency D. Multiple pregnancy E. Abnormalities with fetus or amniotic fluidarrow_forwardWhich of the following occurs during a capacition A. Regeneration of placenta B. Involution of the uterus C. Release of digestive enzymes from the acrosome D. Decreased use of simple sugars for energy productionarrow_forward
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