Which Is True Regarding Closing Volumes of the Lungs

question 14

Multiple Choice

Which is true regarding closing volumes of the lungs?

• A) The closing volume is 10% of the vital capacity in young, healthy individuals.
• B) It increases with age and is 80% of the vital capacity at age 65 years.
• C) Closing volume is used as an aid in the diagnosis of large airway disease.
• D) It is not effective in evaluating treatment or drug response.

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