SFOS 22

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  1. How is total vascular resistance changed
    Vasocontriction modulation from sympathetic NS
  2. Types of local control of blood flow
    • Basal tone - nerve independent vessel tone
    • Blood flow autoregulation - constant flow despite perfusion pressure
    • Active/Functional Hyperemia
    • Reactive Hyperemia
  3. What are the theories of autoregulation?
    Myogenic - autoregulation is intrinsic to vessel (stretched vessels contract to compensate)

    Metabolic - Vasodilator metabolites are produced by the tissue
  4. Active/Functional hyperemia
    Higher blood flow seen when functional activity increased
  5. Reactive hyperemia
    Blood flow increased after period of restricted blood flow
  6. Vasodilator metabolites
    • Adenosine
    • Hypoxia
    • CO2
  7. Vasodilator hormones
    • Bradykinin
    • Histamine
  8. Vasocontrictor hormones
    • Norepinephrine, epinephrine
    • Angiotension II
    • Vasopressin
Author:
zf2010
ID:
80243
Card Set:
SFOS 22
Updated:
2011-04-18 00:19:33
Tags:
Local Control Blood Flow
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Description:
SFOS 22
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