ch 19

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Anonymous
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7101
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ch 19
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2010-02-16 18:18:01
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ch 19
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ch 19
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  1. 3 P's in CV system
    • pumps
    • pipes
    • plasma
  2. take blood away from heart
    arteries
  3. return blood to heart
    veins
  4. functions of blood
    • transportation - O2, CO2, waste, nutrients
    • regulation -homeostasis, temp, water content
    • protection - immune cells, clotting cells
  5. blood characteristics
    • thicker than water
    • higher temp - 100.4
    • pH 7.4ish - slightly alkaline
    • blood volume - male 5-6 li, female 4-5 li
  6. components of blood
    • plasma - 91.5% water
    • formed elements - RBC's, WBC's, plateletes
  7. contains hemoglobin
    RBC's
  8. transports O2 & iron
    hemoglobin
  9. involved in clotting & sealing
    platelets
  10. process by which formed elements of blood develop
    hemopoiesis
  11. hemopoiesis occurs in
    red bone marrow (axial skeleton & girdles)
  12. reproduces itself, differentiates
    pluripotent stem cell
  13. myeloid stem cell
    RBC,platelets, granular WBC's
  14. lymphoid stem cell
    • agranular WBC
    • T & B cells
    • B cells make plasma cells, plasma cells make antibodies
  15. non iron portion of heme converted to
    biliverdin then bilrubin
  16. leukocytes
    WBC
  17. granular leukocytes
    • eosinophils - allergic, parisitic, autoimmune
    • basophils - allergic
    • neutrophils - bacteria, burns, stress, inlam.
  18. agranular leukocytes
    • lymphocyte - t & b cells
    • monocyte - macrophages
  19. most usually fixed, some wander
    WBC
  20. chemicals that attract WBC's
    chemotaxis
  21. break off from megakaryocytes in bone marrow & circulate in blood.
    small, no nucleus, many vesicles
    platelets
  22. 3 main mechanisms to reduce blood loss
    • vascular spasm
    • platelet plug formation
    • blood clotting
  23. extrinsic pathway
    fewer steps, rapid. activated by tissue factor.
  24. intrinsic pathway
    activated by factor inside blood vessel
  25. common pathway
    • both end in prothrombinase
    • converts to prothrombin to thrombin
  26. vitamin K is needed for the liver to make 4 of the clotting factors
    II, prothrombin, VII, IX, X

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