myron 8 - Development What is development? Definition?...

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Development
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What is development? Definition? Change in behaviors and abilities Physical, Mental and Social Why study it?
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Prenatal Development Zygote – fertilized egg containing 23 pairs of chromosomes Three stages of prenatal development Germinal or zygote Embryonic Fetal
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The Germinal Stage First 14 days after conception Cell division Blastocyst
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The Embryonic Stage 2nd through 8th week Development and formation of all major organs and systems miscarriages and genetic defects occur during this time
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The Fetal Stage 9th week after conception until birth Growth and maturation continues Viability occurs at 24 weeks
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Prenatal Environment Internal/external forces interfere with prenatal development INTERNAL EX: Chromosomal abnormalities (Down’s Syndrome) occur during embryonic stage EXTERNAL EX: Teratogens greatest impact during critical periods of prenatal development Examples: alcohol (Fetal Alcohol Syndrome), prescription drugs, over-the-counter drugs
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This note was uploaded on 03/25/2011 for the course PSYCH 1101 taught by Professor Staff during the Spring '11 term at Georgia State University, Atlanta.

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myron 8 - Development What is development? Definition?...

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