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5 Cards in this Set
- Front
- Back
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Obj 1: time sequence from fert thru embryologic stage of development
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Embryonic Stage=week 3-8 of gestation
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Obj 2: critical periods in development and how they relate to teratogens
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Embryonic Stage=week 3-8 of gestation, teratogens cause most harm during this period
Day 15-27 gestation: *NT detects Day 20-50 gestation: *Heart problems Day 24-36 gestation: *limb abnl |
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Obj 3: what can cause birth defects
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-rubella (an infectious agent)
-radiation -drugs --i.e. isotretinoin (Accutane) |
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Obj 4: how can fetus survive and thrive in environment with low partial O2
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1. HbF is at higher concentration than mom's HgA
2. HbF moves more rapidly than mom's HgA 3. HbF has high affinity for O2 b/c it has less 2,3-DPG than HgA (mom has HgA; 2,3-DPG enhances delivery of O2 to tissue and lowers Hg's affinity for O2) |
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Obj 5: Vascular shunts in fetus that allow O2 to get to brain and heart
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1. Ductus venosus
2. Foramen ovale 3. Ductus arteriosus |
