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B. stratum basale

A layer of skin (where mitosis occurs) taht repaes cells lost from the outer layer of th eepidermis is the

stratum basale

Production of cells; melanocytes produce and contribute melanin; hemidesmosomes present

stratum corneum

Desquamation occurs; 25 or more layers of dead squamous cells

D. skin appears blue (cyanosis) oxygenated blood

Concerning skin color, which of these statements is NOT correctly matched?
a. skin appears yellow--carotene present
b. no skin pigment (alinism)--genetic disorder
c. skin tans--iincreased melanin production
d. skin appears blue (cyanosis) oxygenated blood
e. african americans darker than whites--more melanin in african0american skin

papillary layer

Layer of dermis closest ot the epidermis

reticular layer

layer of dermis responsile for jost of the structural strenght of the skin

papillary layer

layer of dermis responsile for fingerprints and footprints

papillary layer

layer of dermis responsible for cleavage lines and striae

a. lanugo

after birth, the type of hair on teh scalp, eyelids, eyebrows is
a. lanugo
b. terminal hair
c. vellus hair

c. is colored by melanin

a. is produced by the dermal root sheath
b. consists of living keratinized epithelia cells
c. is colored by melanin
d. contains mostly soft keratin
e. grows from the tip

c. 3,4,2,1,5

Given these part of a hair and hair follicle:
2. cuticle
3. dermal root sheath
4. epithelia root sheath
5. medulla

Arrange the structures in the correct order from the otuside of the hair follcile to the center of the hair:
a. 1,4,3,5,2
b. 2,1,5,3,4
c. 3,4,2,1,5
d. 4,3,1,2,5
e 5,4,3,2,1

c. genetic factors and the hormone testosterone are involved in "pattern baldness"

Concerning hair growth:
a. hair falls out of the hair follicle at the end of the growth stage
b. most of the hair on the body grows continuously
c. genetic factors and the hormone testosterone are involved in "pattern baldness"
d. eyebrows have a longer growht stagge and resting stage than scalp hair

a. arrector pili

Smooth muscles that produce "goose bumps" when they contract are are attached to hair follicles are called
a. arrector pili
b. dermal papillae
c. hair bulbs
d. root sheaths

sebaceous gland

alveolar glands that produce a white, oily substance; usually open into hair follicles

merocrine sweat gland

coiled, tubular glands taht secrete a fluid taht cools the body; most numerous in the palms of the hands and soles of the feet

apocrine sweat gland

secretions from these coiled, tubular glands are rfoken down by bacteria to produce body odor; found in the axillae and genitalia

c. vitamin D

The skin aids in maintaining teh calcium adn phosphate levelso f hte body at optimum levels by participating in the productions of:

a. vitamin A
b. vitamin B
c. vitamin D
d. melamin
e. keratin

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