RN Exam Practice
Physiological AdaptationQuestion 223 of 2368

A client is dehydrated from vomiting. Which lab result is expected?

  1. Decreased serum osmolarity
  2. Decreased BUN
  3. Elevated hematocrit
  4. Urine specific gravity of 1.005
Show answer

Correct answer: Elevated hematocrit

With deficient fluid volume, plasma decreases and red blood cells become more concentrated, so hematocrit rises.

Source: Nursing Fundamentals, 2nd edition (Open RN, Chippewa Valley Technical College, 2024), Fluids and Electrolytes: Diagnostic and Lab Work. Licensed under CC BY 4.0.

Practice the topic "Physiological Adaptation"

Questions last reviewed: 18 October 2026