topic 10

Question 1

which epidermal cell type is most numerous?

(a) keratinocyte
(b) melanocyte
(c) dendritic cell
(d) tactile cell

Answer 1

(a) keratinocyte*
(b) melanocyte
(c) dendritic cell
(d) tactile cell

Question 2

which cell functions as part of the immune system?

(a) keratinocyte
(b) melanocyte
(c) dendritic cell
(d) tactile cell

Answer 2

(a) keratinocyte
(b) melanocyte
(c) dendritic cell*
(d) tactile cell

Question 3

the epidermis provides a physical barrier due largely to the presence of

(a) melanin
(b) carotene
(c) collagen
(d) keratin

Answer 3

(a) melanin
(b) carotene
(c) collagen
(d) keratin*

Question 4

the skin color is determined by

(a) the amount of blood
(b) pigments
(c) oxygenation level of blood
(d) all of these

Answer 4

(a) the amount of blood
(b) pigments
(c) oxygenation level of blood
(d) all of these*

Question 5

the sensation of touch and pressure are picked by receptors located in

(a) the stratum spinosum
(b) the dermis
(c) the hypodermis
(d) the stratum corneum

Answer 5

(a) the stratum spinosum
(b) the dermis*
(c) the hypodermis
(d) the stratum corneum

Question 6

which is not a true statement about the papillary layer of the dermis?

(a) it is largely areolar connective tissue
(b) it is most responsible for the toughness of the skin
(c) it contains nerve endings that respond to stimuli
(d) it is highly vascular

Answer 6

(a) it is largely areolar connective tissue
(b) it is most responsible for the toughness of the skin*
(c) it contains nerve endings that respond to stimuli
(d) it is highly vascular

Question 7

skin surface markings that reflect points of tight dermal attachment to underlying tissues are called

(a) tension lines
(b) papillary ridges
(c) flexure lines
(d) dermal papillae

Answer 7

(a) tension lines
(b) papillary ridges
(c) flexure lines*
(d) dermal papillae

Question 8

which of the following is not an epidermal derivative?

(a) hair
(b) sweat gland
(c) sensory receptor
(d) sebaceous gland

Answer 8

(a) hair
(b) sweat gland
(c) sensory receptor*
(d) sebaceous gland

Question 9

an arrector pili muscle

(a) is associated with each seat gland
(b) can cause hair to stand up straight
(c) enables each hair to be stretched when wet
(d) provides new cells for continued growth of its associated hair

Answer 9

(a) is associated with each seat gland
(b) can cause hair to stand up straight*
(c) enables each hair to be stretched when wet
(d) provides new cells for continued growth of its

Question 10

the product of this type of sweat gland includes protien and lipid substances that become odoriferous as a result of bacterial action:

(a) apocrine gland
(b) eccrine gland
(c) sebaceous gland
(d) pancreatic gland

Answer 10

(a) apocrine gland*
(b) eccrine gland
(c) sebaceous gland
(d) pancreatic gland

Question 11

sebum

(a) lubricates the surface of the skin and hair
(b) consists of cell fragments and fatty substances
(c) in excess may cause seborrhea
(d) all of these

Answer 11

(a) lubricates the surface of the skin and hair
(b) consists of cell fragments and fatty substances
(c) in excess may cause seborrhea
(d) all of these*

Question 12

the rule of nines is helpful clinically in

(a) diagnosing skin cancer
(b) estimating the extent of a burn
(c) estimating how serious a cancer is
(d) preventing acne

Answer 12

(a) diagnosing skin cancer
(b) estimating the extent of a burn*
(c) estimating how serious a cancer is
(d) preventing acne