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