Renal Blood Supply · Histology

Approximately what percentage of total cardiac output do the kidneys receive under resting conditions?

  1. 4-5%
  2. 8-10%
  3. 45-50%
  4. 20-25%
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Correct answer: 20-25%

The kidneys receive a disproportionately high amount of cardiac output (about 20-25%). This high flow rate is necessary to support the filtration and regulatory functions of the kidneys rather than just metabolic demand.

Difficulty: Medium Question 19 of 20

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