An unsatisfactory spirogram that exhibits glottic closure is caused by which of the following?
A) Obstruction of the mouthpiece by the tongue
B) Vocalization (voice sounds) during the maneuver
C) Coughing, especially during the early part of the expiration
D) Sudden cessation of exhalation caused by closure of the opening to the trachea
Correct Answer:
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Q32: On an ECG tracing,the P wave represents:
A)
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