PSYC 2110 Chapter Notes - Chapter 5: Color Constancy, Sub-Saharan Africa, Perinatal Asphyxia
17 Dec 2017
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Document Summary
Toddlers are top-heavy in comparison to older children. Muscles become longer and thicker as the fibers fuse together. First layer of fat appears during the first year after birth; baby fat . Bone begins to form during the prenatal period, start of as cartilage and become bone in embryonic period. Secular growth trends: changes in physical development from one generation to the next are related to environmental factors. Children can be taller or shorter than average but are normal. Heredity: correlation between heights of identical twins is usually <0. 9. Correlation between heights for fraternal twins is approx. Hormones: chemicals that are released by glands and travel in the blood stream to act on other areas of the body. Pituitary gland: located deep in the brain, secrete hormone gh. Without gh a child can develop dwarfism. Thyroxine: hormone released by the thyroid gland and is essential for nerve-cell development; lack of can lead to cognitive delays.
