skin

Question 1

dermatology

Answer 1

study of skin

Question 2

responsibilities of skin

Answer 2

acts as a barrier to microorganisms
protects the underlying structures from injury
prevents you from drying out
acts as a receptor for sensations
maintains and regulates body temperature
Vitamin D metabolism

Question 3

Body balances

Answer 3

heat production and heat loss

Question 4

heat loss from the skin occurs ___ways

Answer 4

4 
radiation
conduction 
convection
evaporation

Question 5

radiation

Answer 5

heat energy is transmitted via waves to surrounding ares

Question 6

conduction

Answer 6

heat energy is transmitted via contact

Question 7

convection

Answer 7

transfer happens via a gas or liquid or by circulation of a current

Question 8

evaporation

Answer 8

sweat of fluids on the skin absorb heat and change to vapor

Question 9

heat loss also happens via

Answer 9

mucus membranes of the respiratory tract

Question 10

skin of comprised of ___ principle layers

Answer 10

2
dermis
epidermis

Question 11

epidermis

Answer 11

outer, thinner visible layer of the skin

Question 12

dermis

Answer 12

inner, thicker layer of the skin

Question 13

epidermis layers

Answer 13

basal layer
spinous layer
granular layer
clear layer
horny layer

Question 14

basal layer

Answer 14

continuously multiplying to compensate for cell loss on the surface
pushes upwards into next layer
contains melanin that gives skin pigment

Question 15

spinous layer

Answer 15

usually one to two layers thick, can be thicker in regions that are more rugged

Question 16

granular layer

Answer 16

granules visible in cytoplasm of cells
begins to pack the cells with fibrous protein called keratin
process is called kertatinization or cornification
cells begin to die at this leve

Question 17

clear layer

Answer 17

tightly packed clear cells

Question 18

horny layer

Answer 18

fat, lifeless, cornified cells
appear as overlapping,
when unbroken, for a barrier to microorganisms,
dead cells are constantly sloughed off this layer and replace by ones from the basal layer

Question 19

keratinization

Answer 19

gives strength to special epidermal parts such as horns, hooves, beaks, and hair

Question 20

albinism

Answer 20

absence of normal pigmentation

Question 21

cyanosis

Answer 21

blue hue to the skin where there is reduced oxygen supply

Question 22

dermis

Answer 22

made of dense fibrous connective tissue and contains blood vessels and nerves

Question 23

arrector pili

Answer 23

muscles that attach to hair follicles
contraction of this muscle causes hair to raise
increased insulation
raising of hackles

Question 24

sebaceous glands (oil producing), sweat glands, and sensory receptors

Answer 24

are all found in the dermis

Question 25

hypodermis or subcutis

Answer 25

found beneath the dermis (hypo - under, beneath)

Question 26

hypodermis is composed of

Answer 26

loose connective and fatty tissue

Question 27

it allows

Answer 27

skin to move over underlying structure without damage

Question 28

skin thickness/looseness varies depending on

Answer 28

location