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What two parts make up the integumentary system?
Cutaneous membrane (skin) and accessory structure
What two components does the cutaneous membrane have?
Outer epidermis and inner dermis
What makes up the outer epidermis?
A superficial epithelium
What makes up the inner dermis?
What makes up the accessory structures?
Hair, nails, and exocrine glands
How many strata (layers) of keratinocytes are in thick skin?
What two pigments influence skin color?
Carotene and Melanin
Where does vitamin D
What two organs convert vitamin D
Liver and kidney
What aids in the absorption of calcium and phosphorus?
What causes rickets?
Insufficient Vitamin D
What function does elastic fibers have?
It permits stretching and then recoils to original length
What stabilizes the skin?
The subcutaneous layer or hypodermis
What type of muscle is Arrector Pili?
and involuntary smooth muscle
What does the Arrector pili do in the body?
It causes the hair to stand up and produces "goose pimples"
What occurs in a deep epidermal fold near the bone?
Where does nail production occur?
In the nail root
What's the first response of injury?
What happens in step 4 of the healing process?
Scar tissue is formed
What produces scar tissue?
What is inflexible and fibros that occurs when there is injury to the integument?
What produces white hair?
decreased melanocyte ACTIVITY
What causes wrinkles?
The reduction of elastic fibers
test 2 chapter 5