The kidneys and sweat glands both work to prevent excesses of either uric acid or urine in the body. either water or salt in the body. either carbon dioxide or oxygen in the body. either feces or ph levels in the body.

The answer is either water or salt in the body.

One of the roles of kidneys and sweat glands is to prevent excesses of either water or salt in the body depending on the body needs.

Through the process of elimination:

Lungs regulate excesses of oxygen and carbon dioxide.

pH is mainly regulated in the blood, while feces is excessed by the colon.

Uric acid and urine are regulated by the kidneys, but not sweat glands.