Chapter 5 study guide Flashcards Preview

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Flashcards in Chapter 5 study guide Deck (22):
1


funtions of skin


resistance to trauma and infection

water retention

vitamin D synthesis

Sensation

Thermoregulation

non-verbal communication

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resistance to trauma

infection


due to the tightly packed cells few organisms can penetrate

3


water retention


the skin prohibits water absorption and water loss

4


Vitamin D synthesis


carries out first step in synthesis

5


Sensatoin


high concentrations of nerve endings that react to external stimuli

6


thermoregulation


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

7


non verbal communication


facial movements allow for many facial expressions

8


epidermal layers


Stratum corneum

Stratum Lucidum (only in think skin)

Stratum granulosum

Stratum spinosum

Stratum basale

9


derma layers


papapillary layer (superficial)

reticular layer (deep)

10


hypodermis


mainly adipose tissue

allows connection to muslces, and other underlying tissue

11


sudoriferous gland


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

 

12


sebaceous glands


produce oily sebum

usually open into the hair follicle

keep skin and hair from becoming brittle

13


ceruminous


found in auditory canal

excretes cerumen

keeps eardrum pliable

waterproofs canal

kills bacteria

coats guard hairs

14


3 types of skin cancer


basal cell carcinoma

squamous cell carcinoma

malignant melanoma

15


basal cell carcinoma


most common

least dangerous

hardly metastisizes

16


squamous cell carcinoma


spinosum laer

can spread to lymph nodes

can be lethal

17


malignant melanoma


most deadly but only 5%

from melanocytes

metastisizes quickly

often fatal if not treated

18


degrees of burns


1st degree

2nd degree

3rd degree

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1st degree burn


damage to epidermis

most sunburns

20


2nd degree burns


damage to epidermis and superficial portion of dermis

severe sunburn

scalding

21


3rd degree burn


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

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