42. In ancient Greece the
father of Medicine,
Hypocrates, described a
method of diagnosing diabetes
mellitus by tasting the
patient's urine. What is the
physiological explanation for
this archaic method?

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Under normal conditions the
filtered by the renal is almost
entirely resorbed the nephron tubules
and excreted in urine. With
elevated glucose blood level renal
tubules cannot resorb the filtered
glucose and amount of the
substance in the urine. This
is enough to provide sweet
taste that helped to
diagnose diabetes and differentiate it
from other accompanied by
polyuria. Nowadays method is
inconceivable due the danger of
contamination the tester by disease
possibly present in the 's
urine.