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When antidiuretic hormone (ADH) levels are low ________. A a small volume of concentrated urine is excreted B most of the water reaching the collecting ducts is not reabsorbed C nearly all of the filtered water is reabsorbed D aquaporins are inserted into the princip

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Answer: option B - most of the water reaching the collecting ducts is not reabsorbed

Explanation:

Anti-diuretic hormone is a hormone secreted by the posterior pituitary gland. It acts on the kidney to regulate fluid and salt balance in the body by the reabsorbtion of useful fluid (water) from urine.

Thus, when antidiuretic hormone (ADH) levels are low most of the water reaching the collecting ducts is NOT reabsorbed, resulting in the passage of LARGE volume of dilute urine.

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