Determinants
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| Question |
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| Answer |
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| What is the equation for Blood Flow? |
BF = MAP - Venous Pressure/PR |
| What is Perfusion Pressure? |
the DIFFERENCE in Perssure |
| What determines Perfusion Pressure? |
mainly CHANGES in the MAP |
| What is the definition of PR? |
FRICTION of Blood against Aterioles |
| What 2 factors effect PR? |
Blood Viscosity, Vasomotor Tone |
| What 2 factors determine Vasomotor Tone? |
Sympathetic Action, Hormones on Adrenergic Receptors |
| What would be the result of INCREASED Sympathetic Activity on ß2 Receptors? |
DILATION of Coronary & Skeletal Muscle ARTERIOLES |
| What would be the result of DECREASED Sympathetic Activity on ß2 Receptors? |
NORMAL Vasomotor Tone on Coronary & Skeletal Muscle Aterioles |
| What would be the result of INCREASED Sympathetic Activity on Alpha Receptors? |
CONSTRICTION of GI Tract, Kidneys, & Skin Arterioles |
| What would be the result of DECREASED Sympathetic Activity on Alpha Receptors? |
DILATION of GI Tract, Kidneys, & Skin Arterioles |
| Where are ß1 Receptors located? |
only in the Heart, only for Parasympathetic |
| What would be the result of having all dilated Arterioles? |
Anagalactic Shock = faint |
| What is the significance of Vasoconstriction? |
Thermoregulatiion, Venous return |
| An increase in MAP would have what effect on BF? |
INCREASE blood flow |
| An increase in PR would have what effect on BF? |
DECREASE in blood flow |
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