Question

When determining nitrogen balance, urea accounts for what percentage of total urine nitrogen losses?

1: 50%
2: 60%
3: 70%
4: 80%

Answer 1

Urea makes up a substantial portion of urinary nitrogen waste, accounting for approximately 70% of total urine nitrogen losses.

Step-by-step explanation:

When determining nitrogen balance, urea is a significant component of nitrogen loss through urine. An adult typically excretes about 25 to 30 grams of urea via urine each day. Urea accounts for a large percentage of the total urine nitrogen losses, which is essential for evaluating nitrogen balance. The percentage of nitrogen losses accounted for by urea in urine falls within the range of 40% to 80%.

Therefore, among the given options, the closest approximation would be 70% if we are to consider a specific answer to the question, which reflects that urea makes up a substantial portion of the urinary nitrogen waste.