Aging

Question 1

Effects on height:

Answer 1

(peak height at 16-29yold) – compression of cartilaginous disks between vertebrae and loss of vertebral bone

Question 2

Effects on body fat:

Answer 2

Redistribution of body fat
Mass of fat increases and accumulates around abdominal viscera and subcutaneous tissue – less around extremities and face

Question 3

Effects on skin

Answer 3

Skin thins, generation of keratinocytes slows, amount of elastin/collagen decreases, melanocytes reduces photoprotection (graying), decreasing of Langerhan cells (immune system decreases) and less sweat/sebum production

Question 4

Effects on musculoskeletal system:

Answer 4

becomes weak, brittle, stiff

Question 5

Effects on vision:

Answer 5

Pupils lose elasticity (less responsive) – cataracts, glaucoma (elevated pressure in eyes), macular degeneration (central vision gone)

Question 6

Effects on hearing:

Answer 6

Impaired hearing because of loss of hair cells in Corti, loss of nerve cells in cholera, reduced blood supply

Question 7

Effects on the oral cavity

Answer 7

Teeth wear down, enamel thins, dentin darkens, gums reduce, jaw bone shrinks, mouth dries