Which of Following Statements Regarding the Action of the Diaphragm

question 168

Multiple Choice

Which of following statements regarding the action of the diaphragm is not true?

• 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.

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