The relative humidity of an inspired gas is greater than 60% of BTPS. Which of the following statements is true?
a. Production of mucus in the airways will increase.
b. The work of breathing will increase.
c. The airways will function normally.
d. Secretions will become thick and dehy-drated.
ANS: C
When the relative humidity of inspired gas is greater than 60% of BTPS conditions, no injury is believed to occur in normal lungs. The production of mucus will increase, work of breathing will increase, and secretions will become thick and dehydrated when the relative humidity is less than 60% of BTPS.
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