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 6TY
Summary Introduction
Introduction:
During pregnancy, the structure that joins the developing fetus to the maternal body is called the placenta. The placenta is responsible for creating the connection between fetus and the uterine wall of mother that permits the delivery of nutrients to the baby from mother’s body and also allows the gaseous exchange and excrete out the waste from fetus to mother.
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Students have asked these similar questions
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.
Which row correctly identifies the function and source of hCG, respectively?
Select one:
a.
Function
Source
Stimulates FSH
Anterior pituitary
b.
Function
Source
Aids implantation
Uterus
c.
Function
Source
Maintains corpus luteum
Trophoblast and placenta
d.
Function
Source
Stimulates estrogen
Ovary
Which of the following statements does NOT correctly describe the events following fertilization?
Select one:
a. Only the inner cell mass cells in a blastocyst are pluripotent.
b. The trophoblast has an important role in maintaining the pregnancy, as it prevents the endometrium from shedding.
c. As hCG takes over maintaining the endometrium immediately after implantation, the corpus luteum degenerates into the corpus albican.
d. All 16 cells in a morula are truly totipotent, meaning that they can become any cells in the human body.
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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- During the first trimester, hCG produced from the chorion maintains the corpus luteum. What is the purpose of maintaining the corpus luteum? Select one: a. The corpus luteum produces relaxin, which thickens the endometrium. b. The corpus luteum ensures that the endometrium does not break down during the first trimester. c. The corpus luteum supports the formation of the placenta. d. The chorion forms the fetal part of the placenta, and the corpus luteum supports the maternal part of the placenta.arrow_forwardWhich row correctly identifies the function and a source of hCG, respectively? Select one: A. Function Source Stimulate Estrogen Ovary B. Function Source Stimulate FSH Anterior Pituitary C. Function Source Aid Implantation Uterus D. Function Source Maintains Corpus Luteum Trophoblast and Placentaarrow_forwardThe placenta functions to Select one: a. produce blood cells b. create amniotic fluid c. provide nutrition for the growing fetus d. exchange nutrients and wastesarrow_forward
- Which of the following rows identifies structures responsible for maintaining the endometrium before and after implantation? Select one: a. Before Implantation After Implantation Corpus luteum Placenta b. Before Implantation After Implantation Maturing follicle Placenta c. Before Implantation After Implantation Corpus luteum Trophoblast d. Before Implantation After Implantation Maturing follicle Trophoblastarrow_forwardHow can PID (pelvic inflammatory disease) lead to infertility in women? Select one: a. PID can lead to scar tissue developing on the Fallopian tube. This prevents the egg and the sperm from meeting, causing infertility. b. PID prevents the endometrium from forming. There is not enough material for the fertilized egg to implant itself. c. PID leads to scar tissue on the corpus luteum. This disrupts ovulation. d. PID affects the cervix. This causes the cervix to swell, decreasing the chance a sperm could pass into the uterus.arrow_forwardA woman taking birth control pills would be expected to have Select one: a. higher than normal FSH and LH levels due to fewer negative feedback messages being sent to the ovaries b. higher than normal FSH and LH levels due to fewer negative feedback messages being sent to the pituitary gland c. lower than normal FSH and LH levels due to more negative feedback messages being sent to the pituitary gland d. lower than normal FSH and LH levels due to more negative feedback messages being sent to the ovariesarrow_forward
- Superovulation is when women take hormones in order to release more eggs for fertilization. Which of the following rows contains hormones that are involved in developing the follicles and releasing them from the ovary, respectively? What could be the unintended consequence of this process? Select one: a. Hormone Unintended Consequence FSH and LH The formation of twins or multiple births b. Hormone Unintended Consequence FSH and LH A tubal ligation c. Hormone Unintended Consequence FSH and LH Scar tissue on the Fallopian tubes d. Hormone Unintended Consequence LH and FSH Ovarian Cancerarrow_forwardWhich of the following rows identifies structures responsible for maintaining the endometrium before and immediately after implantation? Select one: A. Before Implantation After Implantation Corpus Luteum Placenta B. Before Implantation After Implantation Maturing Follicle Placenta C. Before Implantation After Implantation Corpus Luteum Trophoblast D. Before Implantation After Implantation Maturing Follicle Trophoblastarrow_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
- The 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_forwardWhich of the following rows identifies the site of fertilization, and the hormone released when the fertilized egg implants, respectively? Select one: a. Site of Fertilization Hormone Released Fallopian tube hCG b. Site of Fertilization Hormone released Uterus hCG c. Site of Fertilization Hormone released Uterus Aldosterone d. Site of Fertilization Hormone Released Fallopian tube Aldosteronearrow_forwardA woman taking birth control pills would be expected to have Select one: a. higher than normal FSH and LH levels due to fewer negative feedback messages being sent to the ovaries b. higher than nomal FSH and LH levels due to fewer negative feedback messages being sent to the pituitary gland c. lower than normal FSH and LH levels due to more negative feedback messages being sent to the pituitary gland d. lower than normal FSH and LH levels due to more negative feedback messages being sent to the ovariesarrow_forward
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