Human Biology: Concepts and Current Issues, Books a la Carte Edition; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for ... Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134577784
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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Which of the following statements is NOT correct about the umbilical cord?
Select one:
a. The umbilical cord is formed from the chorion.
b. The placenta connects to the embryon via the umbilical cord.
c. The umbilical cord consists of two arteries and one vein.
d. The umbilical cord is formed from the yolk sac and the allantois.
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 veins
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: Concepts and Current Issues, Books a la Carte Edition; Modified Mastering Biology with Pearson eText -- ValuePack Access Card -- for ... 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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- 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_forwardIn the fertility awareness method of birth control, a woman gauges her monthly fertile period by monitoring changes in the consistency of her vaginal mucus. What kind of information does such a method provide about the likelihood of getting pregnant?arrow_forwardWhich of the following statements is not true about the placenta? A. It provides exchange of wastes and nutrients between the mother and the fetus. B. It develops by the third month of gestation. C. It allows transfer of maternal immunoglobulin D. It allows passage of bacteria and virus. -Provide explanationarrow_forward
- Which 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_forwardWhat would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst? a. The cells would not continue to divide. b. The corpus luteum would continue to produce progesterone and estrogen. c. Menses would flush the blastocyst out of the uterus. d. The uterine mucosa would not envelop the blastocyst.arrow_forwardWhich 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 placentaarrow_forward
- What do the inner and outer surfaces of the placenta consist of? a) amniotic tissue and corpus luteum b) chorion and uterine tissue c) amniotic tissue and blastocyst d) corpus luteum and chorionarrow_forwardThe uterus rises out of the pelvis and becomes an abdominal organ about the: a. Eighteenth weeks of pregnancy b. Eight week of pregnancy c. Tenth week of pregnancy d. Twelfth week of pregnancyarrow_forwardThe birth starts thanks to increased ... a) ... stretching of the uterine muscles. b) ... release of oxytocin. c) ... release of glucocorticoids from the fetus. d) ... release of estrogen from the placenta.arrow_forward
- All of the following changes take place during the last trimester of pregnancy EXCEPT- a, the cerebral cortex develops b. the baby reaches the age of viability c. the fetus gains weight d. the blastocyst implants to the lining of the uterusarrow_forwardThe placenta function to Select one: A. Produce blood cells B. Provide nutrition for the growing fetus C. Exchange nutrients and wastes D. Creat amniotic fluidarrow_forwardWhich of the following correctly describes the results of andropause? Select one: A. Lower sperm count and increased rate of testicular cancer. B. Increased estrogen levels and decrease testosterone levels. C. Decreased fertility and increased testosterone levels. D. Reduction of muscle and bone mass and lower sperm count.arrow_forward
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