Which of the following is/are true about the flow-resistor breathing exerciser?
1) Exhaled gas flows unimpeded out a one-way valve.
2) Resistance is created by a variable-size orifice.
3) Imposed load varies with the rate of flow.
A) 2 and 3 only
B) 1, 2, and 3
C) 1 and 2 only
D) 2 only
Correct Answer:
Verified
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