Gradual thinning and graying of the hair occurs naturally with age. Thinning is caused by , whereas graying is caused by .
a. destruction of the germ centers that produce hair follicles; cessation of pigment production
b. cessation of pigment production; destruction of the germ centers that produce hair follicles
c. decrease in epidermal cells; changes in collagen content
d. changes in collagen content; decrease in epidermal cells
Question 2
Most facial wrinkling experienced by adults is
a. inevitable. b. genetic.
c. caused by an overuse of vitamin E.
d. preventable if one limits exposure to the sun's ultraviolet rays and doesn't smoke.
Cellular movements caused by the actions of flagella and cilia
Scientists have demonstrated functional hair regeneration from adult stem cells
External and cross-sectional view of an infarct caused by a myocardial infarction.
Lyme disease and other infections are caused by the bite of a tick.
Steric effects caused by ligand binding to the heme of myoglobin
Dodder (Cuscuta), also known as strangleweed or devil’s hair. This parasitic flowering plant has ...