quiz 4

Question 1

darker skin tone in areas of greater sunlight, lighter skin tones found in areas that have least amount of sunlight

Answer 1

geographic distribution

Question 2

dark skin tones serve to protect against cell damage due to?

Answer 2

excessive ultraviolet radiation

Question 3

absorbs ultraviolet radiation and prevents excessive amounts of stratum germinativium and dermis

Answer 3

melanin

Question 4

presence of a thicker stratum corneum also prevents excessive (uvr) from reaching the _____ _____ _____

Answer 4

lower mitotic cells

Question 5

melanocytes respond to increased amounts of ultraviolet radiation by producing melanin

Answer 5

tanning

Question 6

you get vitamin D from?

Answer 6

UVR reaching the deeper skin layers to facilitate to facilitate this chemical process

Question 7

dark skin in low UVR exposure

Answer 7

decreased production of vitamin D

Question 8

necessary for bone growth

Answer 8

Vitamin D

Question 9

lack of vitamin d leads too

Answer 9

a deficiency in rickets in children, and osteomalacia in adults

Question 10

True or False: are dark skin people more sucepatable to damage in by extreme cold than light skin

Answer 10

true

Question 11

reside in the dermis and subcutaneous layer, but originate from epidermal tissue; hair is present on nearly all human skin surfaces, but primarily is short and very fine

Answer 11

hair and the hair follicle

Question 12

houses the hair

Answer 12

Follicle

Question 13

zone of actively dividing cells at the base of the hair

Answer 13

bulb

Question 14

a column of flattened, dead keratinized cells within the follicle

Answer 14

Root

Question 15

a column of flattened, dead keratinized cells external to the skin’s surface

Answer 15

Shaft

Question 16

Muscle attached to hair follicle surface and to the dermis; also responsible for goosebumps

Answer 16

Arrector pili muscle

Question 17

modified hardened stratum corneum; divisible into nail root, nail body, and free edge

Answer 17

nail plate

Question 18

underlying the nail plate; continous with stratum basal and stratum spinosum of surrounding epidermis

Answer 18

nail bed

Question 19

part of the nail plate; light half moon region at the proximal end of the nail plate, due to extreme thickness of underlying nail bed

Answer 19

Lunula

Question 20

holocrine gland; secretes sebum which lubricates and waterproofs hair and stratum corneum; alveolar in shape, connected to the hair follicle

Answer 20

sebaceous gland

Question 21

odoriferous merocine sweat gland, concentrated in axillary and pubic regions; responds to emotional stress; tubular in shape, connected to the hair follicle

Answer 21

Apocrine

Question 22

merocrine sweat gland, found all over the body, especially in the forehead,back, palms, and soles; functions in evaporative cooling, plus excretion of certain bodily wastes; tubular shape, exits directly onto the surface of the skin

Answer 22

Eccrine