Chapter 10 – Human Development.docx

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

Chapter 10Human DevelopmentMost important markers of the transition to adulthood 1 Accepting responsibility for oneself 2 Making independent decisions 3 Becoming financially independentIn that order y Characterized by individualismYoung Moroccans were asked how do you know youre grown up Two most common types of responses 1 Those that emphasized chronological age or physical development such as the beginning of facial hair among boys 2 Those that emphasized character qualities such as developing selfcontrol Aging Beginsy Most obvious indicator that aging begins in young adulthood is graying hair y Begins to thin for both men and women and the hairline begins to recede for many men y Levels of human growth hormone gradually decline in young adulthood and beyond causing skin to become looser and the amount of muscle mass to decrease y Heart muscle starts to become more rigid but this is not noticeable except during times of intense physical activity when there is a decrease in the maximum heart rate y During young adulthood the immune system remains strong but declines in ways that may not yet be detectable y Takes longer to recover from injuriesTCells immune cells produced by the thymus that fight disease in the body y The thymus a gland in the upper part of the chest gradually reduces its production of tcells ceasing entirely by age 50BCells immune cells that originate in bone marrow and produce antibodies that destroy bacteria and virusesy Production declinesBasal Metabolic Rate BMR amount of energy the body uses when at rest y From age 25 to 50 the average persons BMR declines as a natural part of the aging process y Biological contributor to weight is genetics y Leptin is released by fat cells to signal that the body has had enough to eat and it also influences BMR y Within developed countriespeople in the lowest socioeconomic classes with the least money have the highest rates of obesity
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