What leads to the decrease of glucose levels in urine?

The decrease of glucose levels in urine primarily occurs due to processes such as glycolysis and bacterial consumption. Glycolysis is the metabolic pathway that breaks down glucose for energy, which effectively reduces the amount of glucose available in the urine as it is utilized by various cells for metabolic processes. When glucose is reabsorbed by the renal tubules, it further decreases the concentration of glucose in urine.

Additionally, if pathogenic bacteria are present in the urinary tract, they can metabolize available glucose, further contributing to lower glucose levels in the urine. Both of these mechanisms demonstrate how glucose can be utilized and diminished before it is excreted, leading to lower levels in urine.

The other options do not directly relate to the decrease of glucose in urine. Increased filtration may not necessarily affect glucose levels; dehydration typically leads to concentration of substances rather than a reduction, and the secretion of ADH primarily influences water balance rather than glucose excretion. Hence, glycolysis and bacterial consumption are the primary factors leading to decreased glucose levels in urine.