Which of the following is NOT a condition that must be satisfied for the nephron to function normally?
A. There must be free flow of blood through the glomerular capillaries.
B. An adequate volume of filtrate must be produced, and the filter should not restrict passage of blood cells and proteins.
C. The tubules must be able to reabsorb important substances from the filtrate to excrete other constituents into the filtrate.
D. The urine formed must be able to flow freely from the kidney into the bladder and out of the urethra.
B
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