Test 2 Notes - Test 2 18:42 Chapter 10- Human Development...

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Unformatted text preview: Test 2 18:42 Chapter 10- Human Development Across the Life Span Development- sequence of age-related changes; occurs between conception and death Prenatal Development: Prenatal period- stage of development between conception and birth Most rapid/intense development Stages of Prenatal Development: Germinal Stage o Conception to implantation; about 1 st 2 weeks o Zygote- single-celled fertilized egg o Blastocyst- bundle of cells that zygote kept dividing to form o Stage ends when blastocyst implants on uterine wall (many may not implant) o 3 crucial support structures form after implantation amniotic sac filled with amniotic fluid: regulates exchange of fluids, cushions against environmental shock and temperature changes placenta: passes oxygen and nutrients from moth to baby, gets rid of waste umbilical cord: tube with blood vessels that carry blood between embryo and placenta Embryonic Stage o 3 rd-8 th weeks after conception o called embryo at this point o placental barrier is semi-permeable teratogens: agents that can cause harm to prenatal organism (ex. Chemicals/viruses) Fetal Alcohol Syndrome (FAS): physical and cognitive abnormalities in children of women who drank heavily during pregnancy o Organogenesis: all major organ systems are formed o Sexual Differentiation begins at the end of this stage o Miscarriages most common in this stage Fetal Stage o 2 nd month until birth o called fetus at this point o most rapid growth o towards end gains 1 pound a month, then to 1 pound a week o maturing of organ systems age of viability: 22-26 weeks age at which fetus can survive outside of womb with technology, can survive younger and smaller o development of the senses- all developed before birth hearing best, vision worse (because less to stimulate eyes in womb) o development of the brain Childhood Development Motor Development : as muscles get more mature, get more and more complicated o Developmental norms: median age at which people display behaviors or abilities (average) o Genes and environment affect timing and speed of motor development Different cultures tend to encourage development Paraguay- always carry children and walk up to a year later Cognitive Development : transitions in childrens patterns of thinking o Stage theories: idea that we develop in stages as we age Discontinuous- sudden, dramatic transitions between old and new ways of being Often invariant: must go in order Often universal: everyone goes through same stages o Piaget: stages of cognitive development: Sensorimotor period (birth to 2 years)...
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Test 2 Notes - Test 2 18:42 Chapter 10- Human Development...

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