Chapter 5 study guide

Question 1

funtions of skin

Answer 1

resistance to trauma and infection

water retention

vitamin D synthesis

Sensation

Thermoregulation

non-verbal communication

Question 2

resistance to trauma

infection

Answer 2

due to the tightly packed cells few organisms can penetrate

Question 3

water retention

Answer 3

the skin prohibits water absorption and water loss

Question 4

Vitamin D synthesis

Answer 4

carries out first step in synthesis

Question 5

Sensatoin

Answer 5

high concentrations of nerve endings that react to external stimuli

Question 6

thermoregulation

Answer 6

nerve endings monitor skin temp and signal the body to react to cold or hot

Question 7

non verbal communication

Answer 7

facial movements allow for many facial expressions

Question 8

epidermal layers

Answer 8

Stratum corneum

Stratum Lucidum (only in think skin)

Stratum granulosum

Stratum spinosum

Stratum basale

Question 9

derma layers

Answer 9

papapillary layer (superficial)

reticular layer (deep)

Question 10

hypodermis

Answer 10

mainly adipose tissue

allows connection to muslces, and other underlying tissue

Question 11

sudoriferous gland

Answer 11

located in the epidermis

2 types

merocrine

most numorous, perspire to cool body

apocrine

ducts to hair follicle

sweat is thicker and more fatty acids

assoc with sex pheromones

Question 12

sebaceous glands

Answer 12

produce oily sebum

usually open into the hair follicle

keep skin and hair from becoming brittle

Question 13

ceruminous

Answer 13

found in auditory canal

excretes cerumen

keeps eardrum pliable

waterproofs canal

kills bacteria

coats guard hairs

Question 14

3 types of skin cancer

Answer 14

basal cell carcinoma

squamous cell carcinoma

malignant melanoma

Question 15

basal cell carcinoma

Answer 15

most common

least dangerous

hardly metastisizes

Question 16

squamous cell carcinoma

Answer 16

spinosum laer

can spread to lymph nodes

can be lethal

Question 17

malignant melanoma

Answer 17

most deadly but only 5%

from melanocytes

metastisizes quickly

often fatal if not treated

Question 18

degrees of burns

Answer 18

1st degree

2nd degree

3rd degree

Question 19

1st degree burn

Answer 19

damage to epidermis

most sunburns

Question 20

2nd degree burns

Answer 20

damage to epidermis and superficial portion of dermis

severe sunburn

scalding

Question 21

3rd degree burn

Answer 21

damage to epidermis

damage to entire dermis

often requires skin grafts

can cause death from fluid loss, infection, toxic effects of burned or dead tissue