Answer:
distal tubule, the concentration of ADH
Explanation:
Nephron is the functional unit of kidney. Nephron undergo reabsorption and secretion along different part.
The permeability of distal tubule to water in the second coiled tubule of the nephron is controlled by the concentration of ADH. The concentartion of ADH controls the degree of dilution or urine concentration. High ADH level makes , tubules permeable to water while the absence of ADH makes them impermeable to water.
Hence, the correct answers for blanks are distal tubule and the concentration of ADH.
