What percentage of glomerular filtrate becomes urine?Multiple Choice40%10%25%1%

Break Down the Problem

1. Identify the total volume of glomerular filtrate produced.
2. Determine the volume of urine excreted from this filtrate.
3. Calculate the percentage of glomerular filtrate that becomes urine.

Relevant Concepts

• On average, the kidneys produce about 180 liters of glomerular filtrate per day.
• The average volume of urine excreted per day is approximately 1.5 liters.

Analysis and Detail

1. Total Glomerular Filtrate: $180 \, \text{L}$
2. Total Urine Excreted: $1.5 \, \text{L}$

To find the percentage of glomerular filtrate that becomes urine, we use the formula:

$\text{Percentage} = \left(\frac{\text{Urine Volume}}{\text{Filtrate Volume}}\right) \times 100$

Substituting the known values:

$\text{Percentage} = \left(\frac{1.5 \, \text{L}}{180 \, \text{L}}\right) \times 100$

Verify and Summarize

Calculating the percentage:

$\text{Percentage} = \left(\frac{1.5}{180}\right) \times 100 = \frac{1.5 \times 100}{180} = \frac{150}{180} \approx 0.8333\%$

Rounding this, we find that approximately $1\%$ of the glomerular filtrate becomes urine.

Final Answer

The correct answer is 1%.