Ch 10 - Physiology And Histology 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 of the skins acid mantle
Blood
What causes injured skin to restore itself to its normal thickness
Hyperproduction of cells
What are items in the dermis that respond to touch, pain, cold, heat and pressure
Sensory nerve endings
What are most abundant in the fingertips
Sensory nerve fibers
What is the average internal temperature of the body in degrees Fahrenheit
98.6
Why does the body perspire
To protect us from overheating
What are follicles
Tubelike opening in the epidermis
What is NOT a compound in the body from which free radicals take electrons
Sebum
What is glycation
The binding of a protein molecule to a glucose molecule
What are hair papillae
Cone shaped elevations at the base of the follicle
Where in the body is hyaluronic acid found
Skin
What is hydrolipidic film
Oil-water balance that protects the skins surface
What is a fiber protein found in skin, hair and nails
Keratin
What is the acid mantle
Protective layer of lipids and secretions on the skins surface
Where in the body are coiled structures know as apocrine glands found
Underarm and genital areas
What is the result of the contraction of the arrector pili muscle
Goosebumps
What does the skins 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 to 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 system that sense unrecognized foreign invaders such as bacteria
Langerhans immune cells
What is oil that provides protection for the epidermis from external factors and that lubricated both the skin and hair
Sebum
What is the common name for the stratum cor Wym
Horny layer
What is true of the stratum corneum
It is the outermost layer of the skin
What is the common name of the stratum germiniativum
Basal layer
Where in the skin is the stratum germinativum located
Above the papillary layer of the dermis
What is the common name of the stratum granulosum
Granular layer
What forms the cells 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
What is another name for subcutis tissue
Adipose tissue
What are the glands that excrete perspiration, regulate body temperature, and detoxify the body
Sudoriferous
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
Evaporation
What is the common term for UVA radiation
Aging rays
What is the dermis
Support layer below the epidermis
What function do desmosomes perform
Assist in holding cells together
What are eccrine 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)
What is true of the epidermis
It is the outermost layer of the skin
What performs the function of stimulating cells, collagen and amino acids that form proteins
Fibroblasts
What term do clients commonly use when referring to follicles
Pores
What comprises about 50-70 percent of the skin
Water
What causes the body to produce its own vitamin D
Exposure to sun
What is NOT one of the six primary functions of the skin
Reflection
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
25 times thicker
When do free radicals produce more free radicals
While causing oxidation reactions
What causes skin cells built-in antioxidants to lose their ability to protect cells
Sun exposure
What is true of sun exposure
It has the greatest impact on how our skin ages
What are keratinocytes
Epidermis cells composed of keratin, lipids, and other proteins
Where in the skin are lymph vessels located
Dermis
What protein determines hair, eye and skin color
Melanin
What are melanocytes
Cells that produce skin pigment granules in the basal layer
What are melanosomes
Pigment carrying granules that produce melanin
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 the skin
It is the deepest layer of the dermis
