KROK 1 2011 – Question 151 · KROK (Medicine) · Physiology
A doctor asked a patient to breathe out fully after taking a normal breath. What muscles contract during such exhalation?
- A. Trapezius muscles
- B. External intercostal muscles
- C. Diaphragm
- D. Pectoral muscles
- E. Abdominal muscles
Hint
Quiet expiration is passive recoil, so ask which muscles are recruited to push air out actively and how they change the pressure around the lungs.
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