Early Embryonic Development quiz Flashcards
Early Embryonic Development quiz
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Which of the following is the correct sequence of development from zygote to embryo: A) Zygote, Morula, Blastocyst, Embryo B) Zygote, Blastocyst, Morula, Embryo C) Zygote, Embryo, Morula, Blastocyst D) Zygote, Embryo, Blastocyst, Morula?
A) Zygote, Morula, Blastocyst, Embryo What is the correct sequence of embryonic stages: A) Morula, Blastocyst, Zygote B) Zygote, Morula, Blastocyst C) Blastocyst, Zygote, Morula D) Morula, Zygote, Blastocyst?
B) Zygote, Morula, Blastocyst During embryonic development, what occurs immediately after fertilization?
Cleavage occurs, involving rapid mitotic divisions that produce blastomeres. During the early stages of cleavage, what happens to the cell size and number?
Cell number increases while cell size decreases, enhancing nutrient absorption. Which occurs during embryonic development immediately after fertilization: A) Formation of the blastocyst B) Cleavage C) Gastrulation D) Implantation?
B) Cleavage The gastrula stage of embryonic development is found in what animals?
The gastrula stage is found in all animals that undergo embryonic development. What is the role of the trophoblast in early embryonic development?
The trophoblast forms the outer layer of the blastocyst and develops into the placenta. What is the significance of the zona pellucida during cleavage?
The zona pellucida acts like an eggshell, protecting the developing conceptus. What transformation occurs around days 4-5 in embryonic development?
The morula develops into a blastocyst, consisting of an embryoblast and trophoblast. How does the blastocyst prepare for implantation?
The blastocyst hatches from the zona pellucida and makes contact with the uterine wall.
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