WVSOM Class of 2012 Developmental Defects
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| what is the most sensitive period for teratogenesis? | show 🗑
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| how does situs inversus happen? | show 🗑
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| show | insufficient mesoderm in caudalmost embryo
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| what is holoprosencephaly? what causes it? | show 🗑
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| show | spinal dysraphism
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| what are the 4 spina bifidas? | show 🗑
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| what are the symptoms of meningomyeloceles? | show 🗑
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| if the neural tube fails to close in brain vesicles, what happens? | show 🗑
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| show | alpha-fetoprotein and acetylcholinesterase
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| show | developmental defects
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| show | Birth Defects, Congenital Anomalies
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| malformations produced over a prolonged period of time due to persistent molding forces, e.g. cranial shape change due to decreased amniotic fluid (oligohydramnios): | show 🗑
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| show | disruption
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| show | congenital malformations
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| show | sirenomelia
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| spina bifida occulta is a ___ neural tube defect while spina bifida meningomyelocele is a ____ neural tube defect: | show 🗑
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| dysraphism is most common at what points in the neural tube? | show 🗑
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| show | anterior; posterior
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| what is a CSF-filled meningeal sac? | show 🗑
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| what is a CSF-filled meningeal sac that contains brain tissue? | show 🗑
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| dizygotic twins are what? monozygotic? | show 🗑
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| show | chorion, placenta
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| show | embryoblast of the blastocyst splits in two
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| in monozygotic twins, if the embryoblast splits in two, what structures become fused? | show 🗑
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| in the case of monozygotic twins, when there is a split in the bilaminar stage just before formation of the primitive streak, what structures are fused? | show 🗑
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| show | none
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| when a twin resorbs another twin, the mummified body is known as a what? | show 🗑
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| if the embryoblast or germ disc does not separate completely, what condition develops? | show 🗑
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| Conjoined twins are most common in what type of pregnancy? | show 🗑
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