What are the three components evaluated in a urinalysis?

• A. Physical characteristics (color, clarity, odor); chemical substances (pH, protein, glucose, ketones, blood, nitrites, leukocyte esterase); microscopic elements (RBCs, WBCs, crystals, bacteria).
• B. Only color and odor
• C. Only pH and glucose
• D. Only red and white blood cells.

Answer: (A)

In a urinalysis, three components are evaluated: physical characteristics, chemical substances, and microscopic elements. The physical characteristics include what you can observe with the naked eye or simple tests—color, clarity, and odor. The chemical substances part uses chemical strips to measure things like pH, protein, glucose, ketones, blood, nitrites, and leukocyte esterase. The microscopic elements involve examining the urine sediment under a microscope for red blood cells, white blood cells, crystals, and bacteria.

This combination is the best because each part reveals different information: appearance can hint at concentration, hydration, or contamination; chemical findings flag possible kidney problems, metabolic issues, infection, or bleeding; microscopic analysis confirms and characterizes cells, crystals, or organisms that explain or clarify the chemical results. Other options only mention a single aspect (like color and odor, or pH and glucose, or red and white blood cells), which misses the comprehensive view provided by including all three components.