Which of the following conditions are likely to produce hypoventilation and hypercapnic respiratory failure? I. inadequate respiratory center drive II. inadequate transmission of impulses to myoneural junctions III. hyperventilation and increased VT IV. respiratory muscle weakness
A. I, IV only
B. II, III only
C. I, II, IV only
D. I, II, III, IV
?ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: Hypercapnia is caused by hypoventilation, which results from one or more of the following causes: (1) inadequate respiratory center drive, (2) inadequate transmission of respiratory center drive to myoneural junction, and (3) respiratory muscle weakness.
D. Incorrect response: See explanation C.
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