PSYCO223 Chapter Notes - Chapter 4: Circulatory System, Cochlea, Heart Failure

• School: University of Alberta
• Department: Psychology
• Course: PSYCO223
• Professor: Lisa Smithson

Document Summary

Skin: loss of elasticity, discoloration, damage, lessened sweat & gland production & loss of subcutaneous fat, photoaging: uv rays increase rate of cross linking, cigarette smoking causes skin damage. Hair: graying from cessation of pigmentation (number of pigmented hairs decrease, loss, destruction of germination centers, no known prevention, 20% of women experience hair loss with aging. Voice: thinner & weaker & slower, lower pitch & less pronounciation, breathlessness, trembling (vocal jitter) Body build: decrease in height (shrinking of vertabre, loss of bone mineral) (esp. by women, fat-free mass (ffm) decreases, bmi increases, weight declines due to loss of bone and muscle, exercise can offset these trends. Muscle: sarcopenia: loss of muscle tissue. After 40s/50s, loss of 12-15% of strength per decade. Bones: loss of bone mineral content: Increase in bone destruction compared to growth of tissue. Decrease in bone mineral content of 5-12% /decade from 20s-90s: exercise, diet, not smoking to prevent/minimize, osteoporosis. Deleterious changes in every components of joing.