Chapter 4 - Human Development

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University of Guelph
Family Relations and Human Development
FRHD 1010
Susan Chuang

Chapter 4Infancy Height and Weight y Birth weight doubles by the time the baby is 5 months and triples by the end of the first year to about 10 kilos 22lb on average y Accumulate fat in the early months helps them maintain constant body temperature y Height also increases dramaticallyrate of about 2 cm per month occurring in spurtsCephalocaudal Principle principle of biological development that growth tends to begin at the top with the head and then proceeds downward to the rest of the bodyProximal Principle principle of biological development that growth proceeds from the middle of the body outward Teethingy First tooth appears between 5 and 9 moonths of ageTeething period of discomfort and pain experienced by infants as their new teeth break through their gumsSeveral signs y Salvia production y Bite things often y Tend to become irritable y Reluctant to bottle or breastfeedStrategies to help y Give them something to bite or chew on y Something cold to drink or eat y Topical pain relievers rubbed on the gumsBrain Development Neurotransmitters chemical that enables neurons to communicate across synapsesAxon part of the neuron that transmits electric impulses and releases neurotransmittersDendrites part of a neuron that receives neurotransmittersOverproductionExuberance burst in the production of dendritic connections between neurons
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