ch3 exam4

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ch3 exam4
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2012-11-04 00:48:50
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  1. What is EPITHELIUM?
    • sheet of cells
    • covers exposed areas
    • lines internal cavities
  2. What are the functions of EPITHEIAL TISSUE?
    • provide physical protection
    • control permeability
    • provide sensation
    • produce secretions
  3. What is involved in maintaining the integrity of EPITHELIUM?
    • intercellular connections
    • attachment to basal lamina
    • self perpetuated renewal
  4. What is SIMPLE epithelium?
    only 1 layer
  5. What is STRATIFIED epithelia?
    several layers
  6. What is SQUAMOUS epithelia?
    thin flat cells
  7. What is CUBOID epithelia?
    height equal to width
  8. What is TRANSITIONAL epithelia?
    changes shape
  9. What is COLUMNAR epithelia?
    height is 3-4x width
  10. Describe SIMPLE SQUAMOUS epithelia.
    • in blood vessels
    • reduces friction
    • lines body cavity
    • controls vessel permeability

                                                        
  11. Describe STRATIFIED SQUAMOUS.
    • in mouth, throat, esophagus, and anus
    • a lot of layers
    • flatter towards top
    • protect v pathogens
  12. Describe SIMPLE CUBOIDAL epithelia.
    • lines kidneys
    • 1 layer
    • tube
    • secretion and absorption
  13. Describe STRATIFIED CUBOIDAL epithelia?
    • lines some ducts
    • protect
    • secrete
    • absorb
  14. Describe SIMPLE COLUMNAR epithelia.
    • in digestive tract
    • and uterine tubes
    • protect
    • absorb
    • secrete
  15. Describe STRATIFIED COLUMNAR epithelia.
    • for protection
    • less common
    • pharynx, epiglottis, anus, mammaty gland
  16. Describe PSEUDOSTRATIFIED CILIATED COLUMNAR epithelia.
    • only one with cilia
    • protection and secretion
    • everything touches basal lamina
    • lines respiratory tract
  17. Describe TRANSITIONAL epithelia.
    • in urinary bladder, renal pelvis, and ureters
    • stretches (recoils) and relaxes (expands)
  18. Describe SEROUS GLANDS.
    secrete watery fluids rich in enzymes
  19. Describe MUCOUS GLANDS.
    secrete glycoproteins (mucins) that absorb water to form mucus
  20. Describe MIXED EXOCRINE GLANDS.
    contain cells capable of both serous and mucous secretions and secrete both
  21. Example of SIMPLE TUBUALR.
    intestinal glands
  22. Example of SIMPLE COILED TUBULAR.
    merocrine sweat glands (watery)
  23. Example SIMPLE BRANCHED TUBULAR.
    • gastric glands
    • mucous glands of esophagus, tongue, and duodenum
  24. Example of SIMPLE ALVEOLAR.
    • not in adult
    • stage ofdevelopment
  25. Example of SIMPLE BRANCHED ALVEOLAR.
    sebaceous glands (oil)
  26. Example of COMPOUND TUBULAR.
    • male reproductive glands
    • (testes)
  27. Example of COMPOND ALVEOLAR.
    mammary glands
  28. Example of COMPOUND TUBULOALVEOLAR.
    • salivary glands
    • glands of respiratory passages
    • pancreas
  29. Describe APOCRINE SECRETION.
    • loss of cytoplasm
    • cytoplasmic components shed at apical surface
    • gland cell goes through period of growth and repair
    • (everything gathers in apical surface and part breaks off)
  30. Describe MEROCRINE SECRETION.
    secretory vesicles discharged at surface of gland cell through exocytosis.
  31. Describe HOLOCRINE SECRETION.
    • cell division replaces lost cells
    • cells produce secretion, size increases
    • cells burst, releasing cytoplasmic contents
    • (stem cells at base always reproducing, explode @top)
    •  

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