HSF - Lecture 10 Flashcards
What is a morula?
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Differentiate between a morula and a blastocyst
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Describe the oviduct
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Where does fertilisation occur?
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Differentiate between the blastocyst and the blastocoele
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Describe the asymmetry of the blastocyst.
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Describe the fate of the different cells in the blastocyst
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What is the trophoblast?
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At what stage does the ball of cells implant in the uterus?
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What are germ layers?
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What is the name of the process of formation of the three germ layers?
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What does the inner cell mass that differentiate into?
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What is the fate of the epiblast?
What is the fate of the hypo blast?
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What name is given to epiblast + hypoblast?
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What is e name of the cavity formed within the epiblast?
Amniotic cavity
Compare the yolk sack of chickens and humans
In humans there is no yolk in the sack - evolution has done away with this energy source
Describe where the primitive streak appears and when this happens
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What is the different between the primitive streak and the primitive groove?
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Describe the process of gastrulation in a human
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What determines the fate of cells moving through the primitive streak?
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What structures arise from ectoderm?
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What structures arise from mesoderm?
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What structures arise from endoderm?
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What is the first structure to arise in the embryo?
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Describe the process of neurulation
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What is the difference between the primitive groove and the neural groove?
In exactly the same position, however the primitive streak arises much earlier in development.
Primitive streak gives rise to the three germ layers
Neural groove: gives rise to the neural tube
Where do the neural crest cells come from?
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Which germ layer gives rise to the neural tube and neural crest cells
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What do neural crest cells go on to form?
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Describe the role of HOX genes in development
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From which germ layer do the pleura, pericardium and peritoneum arise?
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What is the difference between the two terms mysenchyma and mesoderm?
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