Term
| alpha1 adrenergic receptors |
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Definition
| lie on the arterioles of several vascular beds, when activated, cause constriction |
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Definition
| site of highest resistance to blood flow |
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Definition
| V = Q/A; where V= velocity, Q = flow (ml/sec), A = cross-sectional area (cm2) |
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Definition
| Q = (change in P)/R; where Q = flow (ml/min), P = pressure gradient(mmHg), R = Resistance (mmHg/mL/min) |
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Definition
| aka SVR, measured by using blood flow equation, using cardiac output as Q, difference in pressure between the aorta and the vena cava as change in P |
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Definition
| R = 8nl/pi x r ^4; where n =viscosity of blood, l = length of blood vessel, r ^4 = readius of blood vessel raised to the fourth power |
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Term
| Relationship between viscosity and resistance |
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Definition
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| Relationship between length and resistance |
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Definition
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| Relationship between fourth power of the radius and resistance |
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Definition
| inversely proportional; if the radius of a blood vessel decreases by one half, resistance increases by 16-fold |
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Definition
| the total resistance of the system arranged in series is equal to the sum of the individual resistances |
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