Test: High School Biology

1.

What is the function of antidiuretic hormone (ADH)?

ADH makes the collecting duct impermeable to water, concentrating the urine

ADH makes the collecting duct permeable to water, diluting the urine

ADH makes the collecting duct impermeable to water, diluting the urine

ADH makes the collecting duct permeable to water, concentrating the urine

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