Fill in the gaps:
Ascending limb of Henle’s loop is ____ to water whereas the descending limb is ____ to it.
impermeable, permeable
Reabsorption of water from distal parts of the tubules is facilitated by hormone ____.
ADH (Vasopressin)
Dialysis fluid contain all the constituents as in plasma except ____.
nitrogenous wastes
A healthy adult human excretes (on an average) ____ gm of urea/day.
25-30
Explanation
The answers are derived from standard NCERT Biology Class 11 content on excretory system: (a) The ascending limb of Henle's loop is impermeable to water while the descending limb is permeable - this creates the counter current mechanism for urine concentration. (b) ADH (Antidiuretic Hormone/Vasopressin) facilitates water reabsorption from distal tubules and collecting duct - this is confirmed in the matching exercise where ADH is paired with water reabsorption. (c) Dialysis fluid contains all plasma constituents except nitrogenous wastes (urea, uric acid, creatinine) which need to be removed from blood. (d) A healthy adult excretes approximately 25-30 grams of urea per day through urine.