Question

what should a doctor examine to determine whether a patients kidneys are functioning correctly?
a. the patients saliva
b. the patients urine
c. the patients bile
d. the patients feces

Explanation:

The kidneys filter waste and excess substances from the blood to form urine. Analyzing urine (urinalysis) can reveal if the kidneys are functioning properly. For example, abnormal levels of proteins, blood cells, or waste products (like creatinine and urea) in urine may indicate kidney problems. Saliva (A) is mainly related to oral and digestive functions (e.g., enzyme presence for digestion). Bile (C) is produced by the liver and stored in the gallbladder, involved in fat digestion. Feces (D) are related to the digestive system's final waste - elimination (from the large intestine), not directly to kidney function assessment.

Answer:

B. The patient's urine