skin color and aging

Question 1

skin color is determined by what three pigments

Answer 1

hemoglobin, melanin, and carotene

Question 2

hemoglobin

Answer 2

pigment found in blood

Question 3

melanin

Answer 3

brown pigment of skin caused by sun

Question 4

carotene

Answer 4

-yellow-orange pigment from foods such as carrots
-builds up in the subcutaneous layer

Question 5

some causes of abnormal skin colors

Answer 5

-lack of melanin production
-sunburn, excess heat
-trauma
-decreased blood flow to the skin

Question 6

the predominant skin cancer risk factor

Answer 6

chronic sun exposure

Question 7

three main types of skin cancer

Answer 7

basal cell carcinoma, squamous cell carcinoma, and malignant melanoma

Question 8

basal cell carcinoma

Answer 8

-most common
-least dangerous
-starts in stratum basale

Question 9

squamous cell carcinoma

Answer 9

-may metastasize
-starts in stratum spinosum

Question 10

malignant melanoma

Answer 10

-highest mortality rate
-spreads to deeper tissue
-starts in melanocytes

Question 11

aging of the integument with age:

Answer 11

-skin repair takes longer
-collagen content decreases and elasticity declines
-immune responsiveness diminishes
-skin becomes drier and less sweat is produced
-altered skin pigmentation
-hair follicle output declines
-vitamin D synthesis decreases
-UV radiation damages skin cell DNA