Final answer:
In the kidney, glucose is filtered and reabsorbed. If there is more glucose than the carrier proteins can handle, the excess is excreted in the urine, particularly in individuals with diabetes.
Step-by-step explanation:
An example of glucose being detected in urine occurs in the kidney. Glucose, water, salts, ions, and amino acids needed by the body are filtered in one part of the kidney.
This filtrate, which includes glucose, is then reabsorbed in another part of the kidney.
However, if there is more glucose present than the carrier proteins can handle, the excess is not transported and is excreted in the urine.
This process is observed in individuals with diabetes and is referred to as "spilling glucose into the urine."
A different group of carrier proteins called glucose transport proteins, or GLUTs, are involved in transporting glucose and other sugars through plasma membranes within the body.