Define Countercurrent Multiplication as It Occurs in the Kidneys

question 33

Multiple Choice

Define countercurrent multiplication as it occurs in the kidneys.

• A)The exchange of substances in the adjacent limbs of the nephron loop containing fluid moving in opposite directions.
• B)The exchange of substances in the adjacent limbs of the nephron loop containing fluid moving in the same directions.
• C)The cycling of urea from the collecting duct to the nephron loop and back.
• D)The bulk reabsorption of substances in the proximal convoluted tubule and the bulk movement of water due to osmosis.
• E)The secretion of ions in response to hormones in the distal convoluted tubule.

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