PSYCH 350 Lecture Notes - Lecture 3: Neural Tube Defect, Spina Bifida, Umbilical Cord
1 Apr 2016
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Document Summary
Early sex difference: more males at conception. Cell development: four major developmental processes: Cell migration cells have to travel sometimes from one end of an organism to the other in order to grow in the right places. Cell differentiation cells are specialized to form the functions that will be appropriate for the place they are developing (stem cells) Stem cells can end up in the wrong place (rarely: boy was born with tumor in brain that ended up being a formed foot. Selective cell death (apoptosis) some cells are programmed to die as part of development. Hands originally develop as mittens with fingers inside them and then the cells in between die this can also go wrong. Phases of prenatal development: germinal conception (2 weeks) zygote . Day 4 blastocyst (large group of cells around 16) This outer mass of cells forms the placenta. The fluid inside will form the amniotic fluid where the eventual embryo will develop.
