Which of the following is not a function of the kidneys?

$A$ patient suffering from $Diabetes \text{ } Mellitus$ drinks more water. This is because they are excreting which excess substance from their blood?

Which one of the following is $CORRECT$ regarding struvite stones in kidney?
$I$. These are formed in response to bacterial infection.
$II$. It is a genetic disorder.
$III$. These grow quickly and become quite large.
$IV$. Occurs in people who consume high protein diet.
$V$. Affected people excrete too much of certain amino acid.

Which one of the following is likely to accumulate in a dangerous proportion in the blood of a person whose kidney is not working properly?

Excretion of bile pigments in urine indicates

Which of the following conditions in the urine indicates $Diabetes$ $Mellitus$?