PSYCH 100 Study Guide - Congenital Disorder, Infant, Fetus
Document Summary
Age of viability: week 22 when fetus may survive if born prematurely. Embryo: a developed zygote that has a heart, brain, and other organs. Fetus: developing individual from 8 weeks to conception or bottle) Ngers, and arches back in response to sudden noise) Rooting re ex - neonate turns head toward things that touch their cheek (nipple. Sucking re ex - infants suck at things that touch their lips. Startle re ex - series of movements in which infant ings out arms, fans the. Babinski re ex - baby"s toes fan out when outer edge of sole of foot is stroked. Teratogen: environmental agent such as a drug, chemical, virus, or other factor that produces a birth defect. Gene: smallest unit through which genetic information is passed. Infants lose these re exes after rst few months of life. Habituation: decrease in response to a stimulus that occurs after repeated presentations of the same stimulus.
