Question

which of following statements about the process of respiration is false? a when the diaphragm contracts, it moves downward. b the intercostal muscles assist inhalation by raising the rib cage. c air flows into the lungs with exhalation. d a quiet, unforced exhalation is a passive process because it does not require any muscle contraction.

Explanation:

During exhalation, air flows out of the lungs, not into them. When the diaphragm contracts it moves downward (A is true). Inter - costal muscles assist inhalation by raising the rib cage (B is true). A quiet, unforced exhalation is a passive process without muscle contraction (D is true).

Answer:

C. Air flows into the lungs with exhalation