NBRC Registered Respiratory Therapist (RRT) Exit Practice Exam

Which of the following best describes insensible water loss?

Through the skin or exhalation Through the urinary tract Through vomit only Through stool only

Correct Answer:

Through the skin or exhalation

Explanation:

Insensible water loss is the water the body loses that you can’t perceive or easily measure. The main routes are evaporation from the skin and water vapor lost during respiration (exhaled air). This is why “through the skin or exhalation” is the best description. In contrast, losses through urine, vomiting, or stool are observable or measurable—sensible losses.

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