Lesson 26: Embryology Week 2 Quizellenj2024-11-15T13:55:18-05:00 Please sign up for the course before taking this quiz. 1. Which is NOT true about the chorionic villi?1 They came from cells of the inner mass. They are part of the implantation process. They are the start of what will become the placenta. They destroy some of the cells of the lining of the uterus to make space for the embryo. Their "villi" (finger-like) structure is found in other places in the body. They secrete HCG which is detected in pregnancy tests. 2. The baby and mother share a blood supply.1 True False 3. What is the lining of the uterus called?1 endometrium germ layer endoderm epiblast placenta 4. Which one of these will NOT develop from the inner cell mass?1 placenta epiblast hypoblast yolk sac bilaminar disc 5. During the first week of development, the embryo (or “pre-embryo”) was getting its energy from the nutrients that had been stored up inside the ovum.1 True False 6. The placenta is made entirely of cells from the developing embryo.1 True False 7. What does the hormone progesterone NOT do?1 Tell the ovaries that a tiny blastula has just implanted. Stops the endometrium from being flushed out. Promotes pregnancy. 8. Pregnancy tests detect levels of progesterone.1 True False 9. Some layers and structures in embryonic development are temporary.1 True False 10. Which one of these does NOT come from the endoderm?1 heart liver and pancreas thyroid, thymus, and other glands lining of lungs lining of digestive system 11. The outer layer of the 2-week embryo is called:1 the chorion the zona pellucida the plasma membrane the blastula 12. Cancers that arise from cells of the mesoderm are called:1 sarcomas carcinomas tumors melanomas Lesson 25: Embryology Week 1 Lesson 27: Embryology Week 3 Back to: Lesson 26: Embryology Week 2
