A patient showing symptoms of impaired renal function has a battery of tests performed.Results are:
Serum creatinine: 2.0 mg/dL
Urine creatinine: 150 mg/dL
Serum osmolality: 270 mOsm
Urine osmolality: 100 mOsm
24-hour urine volume: 2000 mL
-Based on the information provided,which renal function is abnormal in this patient?
A) Glomerular filtration
B) Tubular reabsorption
C) Tubular secretion
D) Renal blood flow

Question

Quizplus · Accepted Answer

The low urine osmolality (100 mOsm) indicates impaired tubular reabsorption, which is responsible for concentrating urine. The normal serum creatinine (2.0 mg/dL) indicates that glomerular filtration is not significantly impaired. The given values do not provide information about tubular secretion or renal blood flow.

A Patient Showing Symptoms of Impaired Renal Function Has a Battery