chapter 3-physical changes Flashcards
biological theories of aging: rate of living
limited amount of energy; excess calories lead to reduced lifespan; hormonal regulatory system adaptation to stress-cortisol increases (high levels-weight gain, trouble sleeping, greater rates of depression, decreased libido)
biological theories of aging: free radicals
highly reactive chemical produced randomly in normal metabolism; robbing helthy cells to satisfy themselves; antioxidants to protect us; also from environment (radiation, smoking, pollution, UV light)
biological theories of aging: programmed cell death theory
cells programmed to self-destruct; osteoarthritis, changes in brain cells, alzheimers, memory loss, personality changes
biological theories of aging: hayflick limit
limited number of times a cell can divide; telomers shorten and eventually cell division stops
biological theories of aging: cross linking
Certain proteins in human cells interact randomly and produce molecules that are linked in such a way as to make the body stiffer; reduce sugars to slow process down
3 approaches to slow or reverse aging process
- delay chronic illnesses of old age
- slow fundamental process of aging to increase life span
- arrest or reverse aging by removing damage caused by metabolic process
changes in skin: why does skin wrinkle
- outer layer becomes thinner, more fragile
- collagen fibers lose flexibility
- elastin fibers lose ability to keep skin stretched
- underlying layer of fat diminishes
changes in skin: counteract effects of sun
sunscreen, creams for face, smoking
changes in skin: other skin changes
pigment containing cells decrease, age spots/moles, varicose veins
changes in hair: caused by
destruction of germ centers that protect hair follicles
changes in hair: women gain
facial hair
changes in voice
lowering in pitch, increased breathlessness and trembling, slower and less pronounces, decreased volume, weaker
changes in body build
decreases in height and fluctuations of weight (men lose 1 in, women lose 2 in)
changes in mobility: muscle
first start to lose muscle mass at 70; 20% of strength at 70, 40% at 80, no difference in rate in men an dwomen, muscle endurance diminished
changes in mobility:bones
loss begins in late 30s, accelerates in 50s, slows in 70s; women more susceptible; osteoporosis (loss of bone mass)
changes in mobility: bones-osteoporosis prevention
- weight bearing exercises
- strength training
- calcium/vitamin D
- reduce alcohol, smoking
- use of bisphosphonates
- supplements-zinc, magnesium, flouride, estrogen
changes in mobility:joints-normal
normal joints have fluid and cartilage to protect bones from rubbing
changes in mobility:joints-osteoarthritis
bone to bone, nothing in between
changes in mobility:joints-rheumatoid arthritis
lots of swelling; hot to the touch, painful, sensitive
pain management techniques
medicine, exercise, compresses, use of devices, surgery, complementary and alternative medicines (CAM)-yoga/meditation, acupuncture, biofeedback, CBT