Lesson 25: Embryology Week 1 Quizellenj2024-10-03T13:57:30-04:00 Please sign up for the course before taking this quiz. 1. What is an ectopic pregnancy?1 When the embryo develops outside the uterus. It's the same as a miscarriage, when the body expels the embryo. When the embryo is flushed out during menstruation. 2. Human and mammal eggs do not go through an hatching process, only bird and reptile eggs do this.1 True False 3. Where does the first week of development occur?1 in the uterus in the fallopian tube in the ovary 4. “Morula” comes from the Greek word “morus” which means:1 berry marble small grape bumpy 5. The development that happens in the first week is essentially the same in any type of animal.1 True False 6. Blastula and blastocyst mean the same thing.1 True False 7. It takes an entire day for the zygote to go through its first mitosis.1 True False 8. Which is totipotent?1 any cell in the morula a blastula cell any stem cell the zygote 9. Which stage of development to scientist target for harvesting? (This would apply to experiments using mice, rats, and even sea urchins.)1 blastula morula zygote 10. What do gap junctions do?1 Ensure that the cells will remain pluripotent. Allow cells to communicate by the exchange of cytosol. Allow a gap to open between cells so that oxygen can flow in. Provide an extremely flexible junction that will divide easily. 11. During the first week of development the number of cells increases but the overall size stays the same.1 True False 12. The cells in a newborn baby’s body are still pluripotent.1 True False 13. Totipotent means that the cell’s DNA is completely open, so that any part of it can be read and copied.1 True False 14. The protective layer around the first-week developing cells is called the:1 zona pellucida membrane chorion corona radiata 15. The “inner cell mass” will grow to become the embyro (baby) and the cells in the outer ring will become the placenta and the outer sac.1 True False Lesson 26: Embryology Week 2 Back to: Lesson 25: Embryology Week 1