What percentage of water, filtered in the glomerulus, is actually excreted?Multiple Choice82%99%18%1%

To solve this question, we need to understand the filtration and excretion process in the kidneys.

1. Break Down the Problem:
   We need to compare the percentage of water filtered in the glomerulus with the percentage that is excreted.

2. Relevant Concepts:
   In the human kidney, about 180 liters of blood are filtered daily, and the glomerulus is responsible for filtering a significant portion of it. However, most of the filtered water is reabsorbed. It is generally accepted that only a small fraction of the filtered volume is excreted as urine.

3. Analysis and Detail:
   The kidneys filter a large volume of water, but due to reabsorption processes in the nephron, the amount excreted is much less. Typically, only about 1% of the filtered water is excreted as urine.

4. Verify and Summarize:
   Given the values provided in the options, the correct answer stands out clearly.

Final Answer

The percentage of water filtered in the glomerulus that is actually excreted is 1%.