KINESIOL 3U03 Lecture Notes - Lecture 2: Rheumatoid Arthritis, Motility, Dexus
6 Apr 2017
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Document Summary
There are critical points during pregnancy where if environment is changed it can dramatically impact results post-birth. Embryonic rapid cell growth in number, and differentiation. Stem cells are pluripotent (potential to give rise to any type of cell: totipotent: zygote. If it is active, it differentiates into a male and testes develop: can develop into female or male, sperm = x or y chromosome. Gender differentiation activation or inactivation determines sex: testosterone/dihydrotestosterone/mullerian suppression factor. If absent, primitive gonad differentiates into ovaries: at 13 weeks, decision is made. Do we have pluripotent cells floating around that we can find and access and. Twins: 1 in 90 are twins and only 1/3 of that are identical. Perfect copies of each other/ same gender. In theory, if genes were the only factor in development, if in same environment then twins would wind up the exact same and develop the same way, develop same issues.
