Q:

Vascular resistance

safaTerkawi
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2022-08-07
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Vascular resistance.

  1. Increases by 50 per cent when the vascular radius is halved.
  2. Is related to the thickness of the wall of the vessel.
  3. Is related to the vessel’s length.
  4. Is affected by blood viscosity.
  5. Is greater in the capillary bed than in the arteriolar bed.
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safaTerkawi
2022-08-07
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A. False   By more than 90 per cent; resistance is related to the fourth power of the radius.

B. False   Vascular resistance is not related to wall thickness.

C. True   It is directly proportional to length.

D. True   Resistance is related to ViscosityLength/Radius4 .

E. False   Total arteriolar resistance exceeds total capillary resistance though the reverse is true for single vessels.

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