7.3: Part 1

Squamous cell carcinoma grows slowly and usually does not spread.

• True

• False

Exposure to the sun, irritating chemicals, or radiation are the usual causes of skin cancer.

• True

• False

On an average adult, the skin covers over 3,000 square inches of surface area and accounts for about 15 percent of total body weight.

• True

• False

Sebum is an antibacterial and antifungal secretion that helps prevent infections on the skin.

• True

• False

Cells of the stratum corneum are constantly shed and replaced by new cells from the stratum germinativum.

• True

• False

Diet, cosmetics, soaps, medications, and emotional stress can all cause eczema.

• True

• False

Carotene is a skin pigment that can lead to a black, brown, or yellow skin tint, depending on racial origin.

• True

• False

Genes present in each racial group determine the amount of melanin produced in the epidermis of the skin.

• True

• False

Impetigo is a highly contagious skin infection usually caused by streptococci or staphylococci organisms.

• True

• False

Freckles are an example of papules.

• True

• False