Indicate Whether the Portion of the Tubule in Question Is

Short Answer

Indicate whether the portion of the tubule in question is permeable or impermeable to the substance in question by using the following answer code (options may be used more than once or not at all).
a.permeable
b.impermeable
*____ The ascending limb of Henle's loop is ______ to H₂O.
*____ The descending limb of Henle's loop is ______ to H₂O.
*____ The vasa recta is ______ to salt and ______ to H₂O.
*____ The distal and collecting tubules in the absence of vasopressin are ______ to H₂O.
*____ The distal and collecting tubules in the presence of vasopressin are ______ to H₂O.