What is the effect on pulmonary compliance in normal subjects moving from a sitting position to becoming supine?
A. Pulmonary compliance fluctuates.
B. Pulmonary compliance remains constant.
C. Pulmonary compliance decreases.
D. Pulmonary compliance increases.
?ANS: D
A. Incorrect response: See explanation D.
B. Incorrect response: See explanation D.
C. Incorrect response: See explanation D.
D. Correct response: Position and posture affect lung and chest wall compliance and airway resistance. In normal subjects, moving from a sitting to a supine position reduces lung (pulmonary) compliance.
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