The ability to form a concentrated urine depends on the regulation of the

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The ability to form a concentrated urine primarily depends on the regulation of the collecting duct, which is responsible for reabsorbing water back into the body. This process is controlled by hormones such as antidiuretic hormone (ADH) and aldosterone. The other structures listed also play a role in renal function but do not have as significant an impact on urine concentration as the collecting duct.

The Ability to Form a Concentrated Urine Depends on the Regulation