Ch.4 exam 4

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  1. What is the INTEGUMENTARY SYSTEM composed of?
    • skin
    • hair
    • nails
    • sweat
    • oil
    • mammary glands
  2. What are the functions of the EPIDERMIS?
    • protect dermis form trauma
    • control skin permeability
    • prevent entry of pathogens
    • synthesize vitamin D
    • sensory receptors to detect touch, pressure, pain, and temp
    • coordinates immune system response
  3. What are the layers of the DERMIS?
    papillary layer and recticular layer
  4. What are the functions of the PAPILLARY LAYER of the dermis?
    nourish and support the epidermis
  5. What are the functions of the RECTICTULAR LAYER of the dermis?
    • restricts spread of pathgens
    • stores lipids
    • attaches skin to deeper tissues
    • blood vessels to assist in thermoregulation
  6. What do the SENSORY RECEPTORS of the RECTICULAR LAYER detect?
    • touch
    • pressure
    • pain
    • vibration
    • temperature
  7. What are the functions of HAIR FOLLILES?
    • produce hairs that protect skull
    • produce hair that provide delicate touch sensations
  8. What are the functions of EXOCRINE GLANDS?
    • assist in thermoregulation
    • excrete waste
    • lubricate epidermis
  9. What are the functions of the INTEGUMENTARY SYSTEM?
    • physical protection
    • reguklation of body temp
    • excretion/ secretion
    • nutrition synthesis
    • sensation
    • immune defense
  10. What is the SKIN and its layers?
    • cutaneous membrane
    • epidermis and dermis
  11. Describe the EPIDERMIS.
    • stratified squamous
    • keratinized
    • *does not have blood vessels
    • **relys on dermis
  12. Describebthe DERMIS.
    • underlying LCT
    • *has blodd vessels
  13. What are KERATINOCYTES?
    • skin cells
    • produce keratin
  14. What are MELANOCYTES? where are they found? function?
    • pigment cells
    • protect from UV radiation
    • deep in epidermis
  15. What are MERKEL CELLS?
    sensory cells
  16. What are LANGERHANS CELLS?
    • fixed macrophages
    • WBC
  17. What are the EPIDERMAL LAYERS from deep to most superficial?
    • stratum basale
    • stratum spinosum
    • stratum granulosum
    • stratum lucidum
    • stratum corneum
  18. Characteristics of the STRATUM BASALE
    • innermost
    • basal layer
    • attached to basal lamina
    • has epidermal stem cells
    • melanocytes
    • and merkel cells
  19. Characteristics of the STRATUM SPINOSUM.
    • keratinocytes bound together by maculae
    • langerhans cells and melanocytes
  20. Characteristics of the STRATUM GRANULOSUM.
    • 1-2 layers thick
    • keratin fibers develop as cells become thinner
    • cells membrane thickens
    • organelles disintegrate
    • cells die
  21. Characteristics of the STRATUM LUCIDUM.
    • 1 cells thick
    • appears as glassy layer in thick skin
    • no nucleus
    • dead
  22. Characteristics of the STRATUM CORNEUM.
    • multiple layers of flat, dead interlocking keratinocytes
    • dry
    • water resistant but not water proof
    • permits slow water loss
  23. What is HAIR?
    • nonliving
    • keratinized
    • extends beyond surface of skin
    • 98% NOT on head
  24. What are HAIR FOLLICLES?
    organs that form hairs, alive
  25. Functions of SEBACEOUS GLANDS.
    • secrete oily lipids that coat hair shaft and epidermis
    • provide lubrication and antibacterial action
  26. Functions of SWEAT GLANDS.
    • produce watery solution by merocrine secretion
    • flush epidermal surface
  27. Types of SEBACEOUS GLANDS and how they secrete.
    • Typical (secrete into hair follicles)
    • Sebeceous Follicles (secrete onto skin surface)
  28. Types of SWEAT GALNDS.
    • Apocrine aka ODORIFEROUS
    • Merocrine
  29. Describe ODORIFEROUS (apocrine) SWEAT GLANDS.
    • limited distribution (axillae, groin, nipples)
    • produce secretion of complex composition
    • strongly influenced by hormones
    • widespread
    • produce thin secretions, mostly water
    • merocrine secretion mechanism
    • contolled by nervous system
    • role in thermoregulation and excretion
  31. What is ACELLULAR SCAR TISSUE the result of?
    the inability to completely heal after severe damage

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Ch.4 exam 4
2012-11-03 06:21:07

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