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Lanugo hair is replaced in a fetus by



51) Lanugo hair is replaced in a fetus by

A) nominal hair.

B) no hair.

C) vellus hair.

D) dermal hair.


52) Since apocrine glands are almost inactive until puberty, they may function primarily in

A) cooling the body.

B) sexual signalling, under the influence of androgens.

C) keeping hair from falling out.

D) strengthening melanin in the skin.


53) Soft keratin is present in the

A) epidermis.

B) hair cuticles.

C) dermis.

D) body of the nails.


54) The white half-moon visible under the proximal part of a fingernail is the

A) matrix.

B) bed.

C) lunule.

D) cuticle.


55) Cleavage lines

A) are scars resulting from overstretching of the dermis.

B) attach the dermis to underlying bone and muscle.

C) form the pattern of epidermal ridges known as fingerprints.

D) run parallel to the orientation of collage bundles in the reticular layer.


56) Tattoos are permanent because

A) Langerhans cells do not recognize the pigments as foreign.

B) the melanocytes are altered to produce different colors.

C) the pigments are injected in the dermis.

D) the pigments are injected in the stratum basale, which continuously replaces the superficial layers that are sloughed off.

57) In the ABCD rule of skin cancer, the letter B stands for

A) big.

B) blisters.

C) border.

D) baked skin.


58) Which connective tissue layer is discussed in the chapter on the integumentary system but is truly not a part of it?

A) dermal papilla

B) hair

C) nail

D) hypodermis


59) Which of the following is a sensory receptor?

A) keratinocyte

B) melanocyte

C) dendritic cell

D) Pacinian corpuscle


60) Which of the following is not a current hypothesis proposed for the evolution of skin color?

A) preventing damage to DNA

B) preventing damage to elastin

C) protecting the level of folic acid

D) protecting the level of vitamin D



Dec 23 2019 View more View Less

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