Test On Skin Flashcards
Why can’t the body regulate as well
Blood supply decrease
Why do wrinkles form
Less collagen and elastic fibers
Why is the skin is really damaged when you grow older
The epidermis thins and isn’t stratified
What are some affects of aging
Skin easily damaged, wrinkles, age spots, or ability to regulate body temperature
Is hair on the thin or thick skin
Thin
Macrophages
Engulf bacteria and viruses
Adipose function
Cushions, insulates, and stores energy
What is the hypodermis made of
Adipose, connective tissue, macrophages, and collagen and elastic fibers
What is the largest organ
Skin
What tissue is in epidermis
Stratified squamous
What must the skin get rid of
Nitrogen compounds
Water retention
Releases and gains water
Facial expressions
Skeletal muscles on face feel attached
Sensation
Money receptors for heat, cold, touch, vibration, and pressure
Where is sensation
Bottom of the feet, palms, face, nipples, and genitals
Integument structure
Skin, hair, nails, glands
After you burn, what typically happens
Water loss
Layers of epidermis
Stratum corneum Lucidum Granulosum Spinosum Basale
Structure of epidermis
A vascular, melanocytes and keratinocytes, in blood vessels and nourished by diffusion of dermis.
Structure of dermis
Vascular, fibroblasts, macrophages, adipocytes, extracellular matrix.
Two factors that determine skin color
Eumelanin: dark
Pheomalanin: reddish yellow
Skin
Protection, regulation, sensation, excretion, immunity, vitamin D production, facial expressions
Hair function
Protection and temperature regulation
Nails function
Surround soft tissue from injuries, enhances small movements
Glands
Secretion and maintain homeostasis
Protection
Epidermis
Sensation
Receptors for heat, cold, touch, vibration , pressure
Temp regulation
Sweat, hair standing on arm
Excretion
Sweat, releasing salts
Immunity
Having defense against disease
Vitamin D production
Absorbs calcium and bone growth
Eumelanin is produced with what gene
MC1R
Constitutive
Born skin color
Faculatative
Temperature skin color is due to tanning
Skin burning process
when keratinocytes are inflamed and damaged from Uv rays
Skin tan process
When cells create extra eumelanin to protect from additional sun exposure
Melanocytes
Spread thru skin and produces the pigment that creates skin color
Three risks factors
Family history
Radiation exposure
Living in sunny environment
Basal cells
Nourish epidermis and are basement cells
What does sunscreen do
Absorbs radiation , reflects or both
How does skin help regular body temp when cold and hot
One called the hair stand up on the body letting air in, creating Kinetic Energy. When hot sweat is formed, then condensation on the skin occurs, evaporation taking away heat
Basal cell carcinoma
Most common, grows slow and looks like skinny waxy bumps, body with high sun exposure: head, arms, legs, face
Squamous cell carcinoma
20% of all skin cancers
More aggressive, but easily treated if found early.
Red, scaly bumps, common on face
Easily spreadable, fair skin
Malignant melanoma
Least common, accounts for more than 75% of all deaths.
Head, neck, trunk
Starts as mole appears as large brown spot w/ irregular borders
First degree burns
Pain, redness, and swelling.
Damage in epidermis
2nd degree burns
Pain, swelling, blistering, redness, parts of dermis and epidermis
3rd degree burns
White or blackened, numb, damage is deep dermis to hypodermis, blood vessels and nerves destroyed, must skin graph
Keratin
Provides flexibility and toughness to skin
