cross-linkage theory

the concept that biological aging results from functional deterioration of body tissues due to the molecular cross-linkages of and subsequent structural changes in collagen and other proteins. [proposed in 1942 by Finnish-born U.S. chemist Johan Bjorksten (1907–1995)]

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Psychology term of the day

May 10th 2024

developmental milestone

any aspect of physical, cognitive, social, or emotional development that is significant and predictable, such that children throughout the world develop this ability, characteristic, or behavior at about the same time. Developmental milestones include presence of first teeth and language acquisition.