Lesson 25: Embryology Week 1 Quizellenj2023-01-13T13:46:09-05:00 Please sign up for the course before taking this quiz. 1. What is an ectopic pregnancy?1 When the embryo is flushed out during menstruation. When the embryo develops outside the uterus. It's the same as a miscarriage, when the body expels the embryo. 2. 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 3. It takes an entire day for the zygote to go through its first mitosis.1 True False 4. Human and mammal eggs do not go through an hatching process, only bird and reptile eggs do this.1 True False 5. Which stage of development to scientist target for harvesting? (This would apply to experiments using mice, rats, and even sea urchins.)1 morula zygote blastula 6. The cells in a newborn baby’s body are still pluripotent.1 True False 7. What do gap junctions do?1 Allow a gap to open between cells so that oxygen can flow in. Allow cells to communicate by the exchange of cytosol. Ensure that the cells will remain pluripotent. Provide an extremely flexible junction that will divide easily. 8. Which is totipotent?1 any cell in the morula the zygote any stem cell a blastula cell 9. The development that happens in the first week is essentially the same in any type of animal.1 True False 10. Totipotent means that the cell’s DNA is completely open, so that any part of it can be read and copied.1 True False 11. Where does the first week of development occur?1 in the fallopian tube in the ovary in the uterus 12. The protective layer around the first-week developing cells is called the:1 corona radiata zona pellucida membrane chorion 13. Blastula and blastocyst mean the same thing.1 True False 14. During the first week of development the number of cells increases but the overall size stays the same.1 True False 15. “Morula” comes from the Greek word “morus” which means:1 bumpy grape marble berry small Lesson 26: Embryology Week 2 Back to: Lesson 25: Embryology Week 1