The areas of the tongue sensitive to tastes. The classical theory about the physiology of taste recognizes the existence of four fundamental tastes - sweet, salty, sour and bitter - each being perceived by specific areas of the tongue by means of gustatory receptors, also known as taste buds.
Theories of Aging. Theories of Aging. Erik Erikson, who took a special interest in this final stage of life, concluded that the primary psychosocial task of late adulthood (65 and beyond) is to maintain ego integrity (holding on to one's sense of wholeness), while avoiding despair (fearing there is too little time to begin a new life course).
Social Theories on Aging. Continuity Theory As persons age they maintain a consistent pattern of behaviors and adapt in ways that are consistent with past behaviors Life satisfaction is determined by how consistent current behaviors are with those of oneâs lifetime experiences.ocial Theories on Aging. Social Exchange Theory Hypothesis is: individual status is defined by the balance between the contributions that people make to society and the costs to support them. Variables that impact what society defines as âcontributionâ are affected by age, gender, social class, education and ethnicity.