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Question

Active transport of substances from the blood into the nephron is called .

A
filtration
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B
tubular reabsorption
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C
tubular secretion
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D
back flow
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Solution

The correct option is C tubular secretion
Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen and occurs mainly by active transport. It is the tubular secretion of H+and NH4+ from the blood into the tubular fluid that helps to keep blood pH at its normal level.

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