What effect does an increase in antidiuretic hormone (ADH) have on the volume of extracellular fluid (ECF)?
A) ECF increases when antidiuretic hormone (ADH) is present.
B) Antidiuretic hormone (ADH) has no effect on ECF.
C) ECF increases initially, and then decreases when antidiuretic hormone (ADH) is present.
D) ECF decreases when antidiuretic hormone (ADH) is present.
Answer: A
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