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 division.
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 division.
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter18: Animal Reproduction And Development
Section: Chapter Questions
Problem 11RQ: Nutrient and waste requirements for the developing fetus are handled during the first few weeks by...
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