Which of the Following Is/are True About the Flow-Resistor Breathing

question 13

Multiple Choice

Which of the following is/are true about the flow-resistor breathing exerciser?
I.Exhaled gas flows unimpeded out a one-way valve.
II.Resistance is created by a variable-size orifice.
III.Imposed load varies with the rate of flow.

• A)II and III
• B)I, II, and III
• C)I and II
• D)II

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