Integumentary System Flashcards
function of the Integumentary system
protection, maintaining body heat, synthesizes vitamin D
what two cells does the epidermis consist of?
Keratinocytes & Melanocytes
what does keratinocytes do
produce a protein called keratin
what is keratin?
a protein that acts a water repellent that helps the skin stay flat
what do melanocytes do
produce melanin
role of melanin
protects nerve endings from UV light and gives us our pigmentation
what is the role of the dermis “true skin”
regulates body temp by SNS and contains blood vessels/nerves
receives strength from collagen and flexibility form elastic fibers
what does the dermis consist of
hair follicles, sebaceous glands, and sweat glands
function of the hypodermis
protects from injury, stores fat and water, and insulates the body.
primary lesions
develops as a result of a disease process
secondary lesion
results from primary lesion or due to clients actions (ex: scratching, picking)
Examples of primary lesions
Macule, papule, nodule, pustule, wheal, vesicle
examples of secondary lesions
scales, erosion, fissure, scar, crust, ulcer
changes related to older age
subcutaneous and elastin fibers become thin and less elastic
senile purpura (flat, reddish purple, non-blanchable)
lentigo senilis “liver spots”
loss of moisture
what is seborrheic keratoses
non-invasive, benign, warty lesions that develop due to older age (brownish gray or black)
back/chest common areas
what is actinic keratosis
rough, scaly patch on skin usually less than 1 inch due to years of sun exposure
common areas: face, lips, ears, forearms, scalp
cherry angioma
benign tumor consisting of a mass of small blood vessels
face, neck, trunk of body
potassium hydroxide (KOH)
hair, nail, or scale specimen collected, placed on a glass slide with KOH added and examined
used for fungal infections
cutaneous immunofluorescence biposy
skin biopsy obtained and a fluorochrome dye applied. antibodies become fluorescent
dx of dermatitis
Tzanck test
fluids and cells collected from blisters, placed on side, stained, and examined
used to identify herpes infections
skin scraping
tissue sample scraped from lesion with a scalpel moistened with oil so skin sticks to blade, transferred, and examined.
fungal infections/scabies
wood’s lamp
an UV light causes organisms such as pseudomonas and fungi to fluoresce
examples of Vitamin D
milk, sunlight,
examples of Vitamin A
carrots,
ex of vitamin C
strawberries,
zinc
meat, green leafy veg
