Compared to the normal plasma osmolarity,the tubular fluid is ________ as it enters Bowman's space,________ at the beginning of the loop of Henle,________ at the tip of the loop,and ________ at the beginning of the distal convoluted tubule.

Question

Quizplus · Accepted Answer

The normal plasma osmolarity is around 300 mOsm/L. The tubular fluid is isosmotic as it enters Bowman's space but becomes hyperosmotic at the beginning of the loop of Henle due to the reabsorption of sodium and chloride ions without water. The osmolarity increases further at the tip of the loop due to the accumulation of NaCl in the interstitial fluid. At the beginning of the distal convoluted tubule, the osmolarity becomes hypoosmotic due to the dilution of the fluid by the reabsorption of water. Therefore, the correct choice is C.

Compared to the Normal Plasma Osmolarity,the Tubular Fluid Is ________