Skin Sciences Flashcards
Why is UVB radiation also known as burning rays?
UVB wavelengths cause burning of the skin as well as cancer.
What is NOt an element if the skin’s acid mantle?
blood
What causes injured skin to restore itself to its normal thickness?
hyperproduction of cells
What are the items in the dermis that respond to touch, pain, cold, heat, and pressure?
sensory and nerve endings
What are most abundant in the fingertips, oppsed to other parts of the body?
sensory nerve fibers
What is the average internal temperature of the body in degrees Fahrenheit?
98.6
What are follicles?
Tubelike openings in the epidermis
What is not a compound in the body in which free radicals take electrons?
sebum
What is glycation?
binding of a protein molecule to a glucose molecule
Cone-shaped elevations at the base of a follicle?
hair papillae
Where in the body is hyaluronic acid found?
skin
What is hydrolipidic film?
oil- water balance that protects the skin’s surface
What is a fiber protein foud in skin, hair, and nails?
keratin
What is the acid mantle?
Protective layer of lipids and secretions on the skin’s surface?
Where in the body are the coiled structures known as apocrine glands?
underarm and genital areas
What is the result of the contraction of the arrector pili muscle?
goose bumps
What does the skin’s barrier function protect us from in addition to irritation?
intercellular water loss
What are ceramides?
glycolipid materials
What is collagen?
fibrous tissue made from protein
What are corneocytes?
hardened keratinocytes
What are membranes of ridges and grooves that attach the epidermis?
dermal papillae
Where in the face does the chronic condition rosacea primarily appear?
cheeks and nose
What protects the surface of the skin?
sebaceous glands
What are guard cells of the immune sysytem that sense unrecognized foreign invadors such as bacteria?
Langerhans immune cells
What is oil that provides protection for the epidermis from external factors and that lubricates both the skin and hair?
sebum
What is the common name for the stratum corneum?
horny layer
What is the startum corneum?
the outtermost layer of the skin
What is the most commo name for the stratum germiniativum?
basal layer
Where in the skin is the stratum germiniativum located?
above the papillary layer of the dermis
What is the common name of the stratum granulosom?
granular layer
What forms the cells in the in the stratum granulosum that resemble granules?
keratin
What is another name for the subcutaneous layer of the skin?
hypodermis
What part of the skin provides a protective cushion and energy storage for the body?
subcutaneous layer/hypodermis
What is another name for subcutis tissue?
adipose tissue
What are the glands that excrete perspiration, regulate body temperature, and detoxify the body?
sudoriferous glands
What cells identify molecules that have foreign peptides, and help to regulate immune response?
T-cells
What causes telangiectasia?
capillary damage
What causes transepidermal water loss (TEWL)?
evaporation
What is the common term for UVA radiation?
aging rays
What is the dermis?
support layer below the epidermis
What functions do desmosomes perform?
assist in holding cells together
What are eccine glands?
sweat glands
What protein fiber is found in the dermis and gives skin its flexibility and firmness?
elastin
What hormone stimulates cells to reproduce and heal?
epidermal growth factor (EGF)
Outermost layer of skin?
epidermis
What performs the function of stimulating cells, collagen, and amino acids that form proteins?
fibroblasts
What comprises about 50-70% of the skin?
water
What function does the enzyme tyrosinase perform?
stimulates melanocytes and thus produces melanin
What is the other type of melanin the body produces, besides eumelanin?
pheomelanin
How many times thicker than the epidermis is the dermis approx?
25
When do free radicals produce more free radicals?
while casuing oxidation reactions
What causes skin cells’ built-in antioxidents to loose their ability to protect cells
sun exposure
Epidermal cells made up of of keratin, lipids, and other proteins.
keratinocytes
Where in the skin are the lymph vessels loacted?
dermis
Cells that produce skin pigment granules in the basal layer?
melanocytes
Pigment carrying granules that produce melanin?
melanosomes
What is true of the papillary layer of the skin?
it is the top layer of the dermis
What is true of the reticular layer of skin?
it is the deepest layer of the dermis
Really Pretty Good Skin Gets Lots of Compliments
Reticular Papillary Germinativum Spinosum Granulosum Lucidum Corneum
