11) As cells pushed from the deeper portion of the : 1200458

11) As cells pushed from the deeper portion of the : 1200458.


11) As cells are pushed from the deeper portion of the epidermis toward the surface,

A) they divide.

B) they die.

C) their nutrient supply increases.

D) they enter the dermis.

E) they produce daughter cells.

12) Thin skin is defined by the thickness of the

A) dermis.

B) epidermis.

C) hypodermis.

D) subcutaneous layer.

E) integument as a whole.

13) The epidermal layer whose cells have stopped dividing and started to produce large amounts of keratin is the

A) stratum corneum.

B) stratum lucidum.

C) stratum basale.

D) stratum granulosum.

E) stratum spinosum.

14) Through which cellular interactions are the cells of the stratum basale firmly attached to the plasma membrane?

A) gap junctions


C) tight junctions

D) connexons

E) hemidesmosomes

15) Choose the correct order of the cell layers, or strata, in a section of thick skin, from the basement membrane toward the free surface (deep to superficial).

1. stratum lucidum

2. stratum basale

3. stratum corneum

4. stratum granulosum

5. stratum spinosum

A) 3, 5, 4, 1, 2

B) 3, 4, 1, 5, 2

C) 2, 1, 4, 5, 3

D) 2, 4, 5, 3, 1

E) 2, 5, 4, 1, 3

16) Drugs suspended in ________ or ________ can be carried across the plasma membranes of the epidermal cells.

A) water; blood

B) water; lipids

C) oils; alcohol

D) oils; lipid-soluble solvents

E) sebum; water

17) In albinism, ________ is lacking.

A) melanin

B) keratin

C) carotene

D) keratinocytes

E) collagen

18) The skin may turn orange as a result of ________ buildup.

A) biliverdin

B) keratin

C) carotene

D) melanin

E) bilirubin

19) ________ is a pigment found in vegetables that can make skin appear orange or yellow.

A) Carotene

B) Melanin

C) Sebum

D) Cerumen

E) Cyanosis

20) A small amount of ultraviolet radiation is beneficial because it ________.

A) increases blood flow in the dermis

B) stimulates the synthesis of photoreceptor pigments in the eye

C) constricts blood vessels in the dermis

D) stimulates vitamin D3 synthesis in the epidermis

E) adjusts overall gland secretion rates in the body



11) As cells pushed from the deeper portion of the : 1200458

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