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