VET1200Tissues

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saraskate0512
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18723
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VET1200Tissues
Updated:
2010-05-11 10:54:36
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tissues
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VET1200 Tissues
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  1. The structure that acts as a partial barrier between the epithelial cells and underlying connective tissue is:
    Basement Membrane
  2. Goblet Cell
    Unicellular Exocrine Gland
  3. The substance responsible for the waterproof quality of the skin and that helps prevent desiccation is
    Keratin
  4. Smooth muscle is described as
    • Involuntary
    • Unstriated
  5. Healing in which the edges of the wound are held in close apposition without the formation of granulation tissue or significant scarring is called:
    First Intention
  6. What are the 4 primary types of tissue?
    • Epithelial
    • Connective
    • Muscle
    • Nervous
  7. Functions of Epithelial Cells:
    • 1. Protects, covers, and lines
    • 2. Filters biochemical substances
    • 3. Absorbs nutrients
    • 4. Provides sensory input
    • 5. Manufactures Secretions
    • 6. Manufactures Excretions
  8. 4 General Characteristics of Epithelia:
    • 1. Polar (have a sense of direction relative to surrounding structures)
    • 2. Connected by junctional complexes
    • 3. Lack blood cells or capillaries (avascular)
    • 4. Most are INNERVATED and provide valuble sensory input
  9. 3 Types of Cellular Junctions:
    1. Tight Junction (formed by fusion of the outermost layers, found in tissue that can have no leaks, ex: bladder)

    2. Desmosome (formed by filaments that interlock with each other, found in tissues that undergo repeated episodes of tension/stretching, ex: skin, uterus, or heart)

    3. Gab Junction (linked by tubular proteins, allows passage of ions and nutrients, ex: intestinal epithilial cells, smooth muscle tissue)
  10. Endocrine Gland
    do not have ducts or tubules and its secretions are distributed throughout the body

    ex: pituitary gland (brain) and adrenal gland (kidney)
  11. Exocrine Gland
    have ducts and discharge secretions through them directly into nearby ducts

    ex: sweat and salivary glands
  12. Merocrine
    glands package their secretions and release them via exocytosis as they are manufactured
  13. Apocrine
    glands store their secretions and then release the top part of the cell into the duct system
  14. Holocrine
    gland store their secretions and then release the entire contents of the cell
  15. What is the difference between serous and mucous secretions?
    Serous: watery and contain a high concentration of enzymes

    Mucous: think and composed of glycoproteins
  16. What are 3 major components of connective tissue?
    • 1. Ground Substances
    • 2. Fibers
    • 3. Cells
  17. Fibroblast
    fixed cell involved in the development of connective tissue
  18. Collagenous Fiber
    • "white fiber"
    • -strong think strands of collogen
    • -found in tendons and ligaments
  19. Reticular Fibers
    • -thin, delecate branched networks of collegen
    • -provide support for highly cellular organs
  20. Elastic Fibers
    • "yellow fibers"
    • -branched networks composed primarily of the protein elastin
    • -occurs in tissues commonly subjected to stretching (vocal cords, lungs, skin)
  21. Connective tissue is divided into what 2 main catagories?
    • 1. Proper
    • 2. Specialized
  22. Name and describe LOOSE connective tissues:
    1. Ariolar- surrounds every organ, forms the sq layer, present in mm

    2. Adipose-highly vascular, acts as an energy storehouse/thermal insulator

    3. Reticular-forms the stroma(framework of several organs)
  23. Name and descrive the DENSE connective tissues:
    1. Dense Regular- white appearence, reletively avascular, can be found in FASCIA sheets that cover muscles

    2. Dense Irregular- composed of collegen fibers arranged in thinck bundles, found in dermis of skin, forms the touch capsule of joints

    3. Elastic- primarily composed of elastic fibers, found in spaces bt vertebrae and in areas of the body that require stretching
  24. Describe the 3 types of Cartilage and where they might be found:
    1. Hyaline Cartilage- found in joints and at the end of long bones

    2. Elastic Cartilage- found in epiglottis of the larnx and in the pinae of ears of animals

    3. Fibrocartilage- found in spaces bt vertebrae of the spine, between bones in the pelvic girdle and in the knee joint
  25. Membranes are composed of what 2 tissue types?
    Epithelial and Connective Tissues
  26. Name the 4 types of membranes foudn in the body and give an example of each.
    • 1. Mucous, ex: submucosa
    • 2. Serous, ex: peritonia
    • 3. Curaneous, ex: "skin"
    • 4. Synovial, ex: synovial fluid fills the joint spaces
  27. What is effusion?
    excess fluid that has escaped into a body cavity to the detriment of normal body function
  28. What is ascites?
    accumulation of fluid in the abdomin
  29. Name the 3 types of muscles and define each of them:
    • 1. Skeletal- straited and voluntary
    • 2. Smooth- nonstraited and involuntary
    • 3. Caridac- straited and involuntary
  30. Name the 2 types of cells that make up neural tissue?
    • 1. Neurons
    • 2. Supporting Neuroglial cells
  31. The body's initial response to injury is:
    imflammation
  32. What is granulation tissue?
    tissue that forms beneath the overlying blood clot or scab
  33. What is proud flesh?
    when granulation tissue becomes too think and stands out over the epithelial layer
  34. Descrive 1st, 2nd, and 3rd Intention wound healing:
    1st Intention: edges of wound held in close apposition, no significant granulation tissue or scaring

    2nd Intention: edges of wound separated from each other, granulation tissue forms to close gap, scaring occurs

    3rd Intention: contaminated wound left open until contamidation is removed, clean out THEN pull skin together

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