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Integumentary System

A&P Herlihy Ch 7

What are characteristics of the epidermis? 1) is a thin layer of the skin 2) is formed of stratified squamous epithelium 3) is avascular
Name the layers of the epidermis 1) Stratum germinativum 2) Stratum corneum
What is keratinization? 1) skin cells are hardened & flattened with the protein keratin 2) keratin make the skin cells water resistant
What is the subcutaneous (hypodermis, sub q) layer? 1) it is directly below the dermis (hypodermis) 2) formed of loose connective tissue & adipose tissue (fat) 3) it is highly vascular
What are the functions of the subcutaneous layer? 1) insulate the body from extreme temperature changes in the external environment 2) it anchors the skin to the underlying structures
What is urticaria? Hives which may be caused from an allergic reaction
What type of cell is associated with tanning? melanocytes
Dark pigmentation such as moles & freckles are caused by what? melanin
What causes a yellow pigment in the skin? carotene
Bluish skin tint caused by poor oxygenation is called? cyanosis or cyanotic
Dilated blood vessels of the skin cause... blushing or flushed skin
A condition of hair loss is called... Alopecia
Chemotherapy can cause this condition... Alopecia
Vernix Caseosa covers and protects what? a fetus
Vernix Caseosa is secreted by what type of gland? Sebaceous
Name the two types of modified sweat glands: 1) Mammary glands 2) Ceruminous glands
Ceruminous glands secrete... ear wax (cerumen)
Sudoriferous glands secrete... sweat
What are the four types of heat loss? 1) radiation 2) conduction 3) convection 4) evaporation
Vasodilitation near the surface causes... heat loss (lowers body temperature)
Eccrine glands are associated with... body temperature regulation
Sebaceous glands secrete... sebum (oil) into the hair follicle
Skeletal muscles shiver in order to... produce heat
Sweat is produced to promote... heat loss
Blood vessels constrict to.... conserve heat
This type of skin cancer has the poorest prognosis: melanoma
Metabolism associated with brown fat is called: non-shivering thermogenesis
What is produced when arrector pili muscles contract? goosebumps
What process causes a callus to be produced? continuous irritation stimulates the stratum germinativum to produce rapidly, causing thickened skin.
Created by: blankenshipm