Body Fluids And Circulation Question 12
Question: If cardiac output is 6.0 L/min and 1.44 L of urine is formed daily, what percentage of flow in the nephrons and collecting ducts is reabsorbed (kidneys receive 20% of cardiac output)?
Options:
A) 0.1%
B) 0.02%
C) 99.9%
D) Data insufficient
Show Answer
Answer:
Correct Answer: C
Solution:
Cardiac output (CO) is 6.0 L/min. Kidneys receive 20% of the cardiac output. Therefore, the renal blood flow (RBF) is 20% of 6.0 L/min. RBF = 6.0 L/min × 0.20 = 1.2 L/min Daily RBF=1.2L/min×1440min/day=1728L/day Reabsorption percentage=( 1728L/day 1726.56L/day )×100
Reabsorption percentage ≈ 99.9 % Reabsorption percentage≈99.9%
BETA
