Question : MULTIPLE CHOICE. Choose the one alternative that best completes the : 2076801

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________.

A) accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer

B) maintain the appropriate pH in order for the melanocyte to synthesize melanin granules

C) maintain the appropriate temperature so the product of the melanocyte will not denature

D) provide the melanocyte with nutrients necessary for melanin synthesis

2) Water loss through the epidermis could cause a serious threat to health and well-being. Which of the following protects us against excessive water loss through the skin?

A) The dermis is the thickest portion of the skin and water cannot pass through it.

B) The size and shape of the cells that make up the stratum spinosum, as well as the thick bundles of intermediate filaments.

C) Fat associated with skin prevents water loss.

D) Lamellar granules of the cells of the stratum granulosum, a glycolipid that is secreted into extracellular spaces.

3) The composition of the secretions of the eccrine glands is ________.

A) primarily uric acid

B) fatty substances, proteins, antibodies, and trace amounts of minerals and vitamins

C) metabolic wastes

D) 99% water, sodium chloride, trace amounts of wastes, and vitamin C

4) The single most important risk for skin cancer is ________

A) overexposure to UV radiation

B) genetics

C) use of farm chemicals

D) race

5) Sudoriferous (sweat) glands are categorized as two distinct types. Which of the following are the two types of sweat glands?

A) holocrine and mammary

B) eccrine and apocrine

C) sebaceous and merocrine

D) mammary and ceruminous