Comparing reabsorption and secretion in the nephron, which of the following statements is TRUE?
A. secretion occurs when materials in the lumen of the tubules reenter the blood
B. secretion occurs when materials leave the blood at the glomerulus
C. reabsorption occurs when materials from the blood reenter the tubules
D. reabsorption occurs when materials in the tubules renter the blood vessels.
E. reabsorption occurs when materials in the interstitial spaces around the tubules enters the lumen of the tubules.
Answer: D. reabsorption occurs when materials in the tubules renter the blood vessels.
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