Skin Physiology Flashcards
what causes pigmentation in the skin?
melanocytes
what plays an important role in skin coloration (not pigmentation)?
hemoglobin
when hemoglobin content decreases, skin color will?
become pale (pallor/blanching)
when hemoglobin content decreases excessively, skin color will?
become blue (cynosis)
when hemoglobin rushes to the skin due to vasodilation, skin color will?
become pink
medical term for skin redness?
erythema
NTC: embarassment
erythema
NTC: fever
erythema
NTC: hypertension
erythema
NTC: inflammation/allergy
erythema
NTC: emotional distress
Pallor/Blanching
NTC: anemia
Pallor/Blanching
NTC: low blood pressure
Pallor/Blanching
NTC: Liver disease
Jaundice
NTC: Bile in tissue
Jaundice
NTC: hypofunction of the adrenal cortex
Bronzing
NTC: bruising or blood clots
Black and Blue
NTC: accumulation of melanin
freckles and moles
NTC: too much vitamin A
Orange
NTC: bile pigments in blood and carotenes in subcutaneous fat
Yellowish
location of specialized cutaneous receptors and nerve endings
dermal layer of the skin
how does vasodilation regulated body temp?
increasing blood flow
how does vasoconstriction regulated body temp?
decreasing blood flow
Parts of a skin assessment (5):
- Color
- Integrity
- Moisture
- Temperature
- Turgor
of days for skin renewal?
28-50 by shedding the outtermost layer
pH range for skin
4.0 to 5.6
Thin outer layer of skin?
Epidermis
Thick CT layer of skin?
Dermis
Subcutaneous layer of skin?
Hypodermis
What layer follows the subcutaneous?
Muscle and Fat
What is the epidermis made of?
Stratified ET
T/F Epidermis is vascular
False
How does the epidermis get it’s nutrients?
the capillaries in the dermis
which layer of the skin contains nerves, blood, and lymph?
Dermis
Where do oil and sweat glands originate?
Dermis
What layer of the skin is responsible for stretch marks?
Dermis
Which layer of the skin anchors skin to underlying structures?
Hypodermis
Which layer of the skin contains adipose tissue and blood vessels?
Hypodermis
Which layer of the skin is a common site for injections?
Hypodermis
What layers does a partial thickness tissue loss wound include?
Epidermis and into the dermis
How does a partial thickness tissue loss wound heal?
Epitheliaztion/Regeneration of epidermis across the wound
What layers does a full thickness tissue loss wound include?
Epidermis, Dermis, and Hypodermis (subcutaneous)
AND
may involve muscle, tendon, or bone
Stages of a full thickness tissue loss wound healing (3)?
- Granulation
- Contraction
- Epithelialization
what is eschar/slough?
dead skin where nerves are dead or dying; usually black in color
what’re the stages of wound healing (4)?
- Not Healing
- Early/Partial Granulation
- Fully Granulating
- Newly Epithelialized
what is exudate?
liquid
In what layer does granulation take place?
hypodermal/subcutaneous
most common site for pressure ulcers?
bony prominences
what is shear?
mechanical force caused my gravity and friction
Where do venous ulcers usually occur on the body?
lower extremity
where do diabetic ulcers usually occur?
lower limbs
what causes venous/stasis ulcers?
inadequate venous circulation
what causes arterial ulcers?
inadequate blood supply (usually from blockages such as fatty plaque in the arteries)