Water that is filtered out of the blood by the kidneys is returned to the body through the action of aquaporins. Which of the following statements about water balance disorders is scientifically accurate?
A) People with heart failure often swell due to too much water from excess numbers of aquaporins.
B) Water retention (too much water) in pregnancy can be due to a decreased number of aquaporins.
C) Kidney failure and decreased urine production are due to increased numbers of aquaporins.
D) Small amounts of urine are produced by people who inherit a defect in the ability to make aquaporins.
Answer: A
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