Ch 6 integument system Flashcards
What membrane is the skin?
Cutaneous membrane
What is dermatology?
Study of skin
What tissue is found in the epidermis?
Stratified squamous epithelium
What does the stratified squamous epithelium protect from?
Abrasion
What tissues is in the dermis layer?
Dense irregular connective tissue and areolar
What is the function dense irregular CT?
Resists stretch in multiple directions
What tissue is in the hypodermis (subcutaneous) layer?
Adipose tissue
What occurs in Stratum Basale?
Mitosis
What kind of layer is stratum spinosum?
Spiny layer
What kind of layer is darkest layer?
Stratum granulosum
What layers have dead cells?
Corneum, lucidum, granulosum
What layer is transparent?
Stratum lucidum
What is the top layer of the epidermis?
Stratum corneum
What does the stratum basale do?
Replicate cells
What is does keratin do?
Water resistant’s
What does melanin do?
Produce and store pigment
What does melanosomes do?
Transfers pigment (protects DNA)
What layer lets us know touch?
Stratum basale
What does the epidermal dendritic cell do?
Initiate immune response
What does thick skin have?
Sweat glands
Where is stratum lucidum located?
Thick skin; sole and palm
What does stratum corneum protect against?
Abrasion and infections
What does thin skin have?
Sweat glands, sebaceous glands, and hair follicles
What determines hemoglobin?
Oxygen
What determines melanin?
UV exposure
What determines carotene?
Some vegetables
What causes nevus (mole)
Overgrowth of melanocytes
What causes hemangiomas?
Blood vessel tumor
What causes freckles?
Increase in melanocyte activity
What tissue is in the papillary layer?
Areolar tissue
What are friction ridges?
Fingerprints
Two layers of dermis
Papillary and reticular layer
What tissue is in the reticular layer?
Dense irregular CT
What is the function of elastic fibers?
Stretch and recoil
What function is collagen fibers?
Resist stress in one direction
What does collagen and elastic fibers do?
Bundles functions
What tissues are found in the subcutaneous layer?
Areolar and adipose CT
What happens when collagen fibers are torn?
Stretch marks (striae)
What are the functions of subcutaneous layer?
Protection, energy storage, insulation
What is calcitriol?
Increases absorption of calcium and phosphate
What is metabolic regulation?
Formation of vitamin D3 and produces calcitriol
Merocrine
Exocytosis
Apocrine
Apical
Holocrine
Whole cell
What is sweats function?
Secretion
Main function of merocrine sweat glands
Regulate body temp.
Main function of apocrine sweat glands
Activate during puberty
What is sebum?
Oil glands
What kind of glands are holocrine glands?
Sebaceous glands
What are the two types of apocrine glands?
Ceruminous and mammary glands
What is cerumen?
Earwax
What is regeneration?
Replacement with same cell type
What is fibrosis?
Change with fibroblast
What is stem cells?
Immune system of skin
What is the rule of nines?
A tool used to estimate a burn’s percentage of your total skin, by separating the body by multiples of 9%.