The diagram shows the ribs and some of the muscles used in breathing.W – InterviewSolution

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1.	The diagram shows the ribs and some of the muscles used in breathing.Which muscles relax in moving from position x to position y?DiaphrgmExternal Intercostals(a)NoNo(b)NoYes(c)YesNo(d)YesYesA. (a) B. (b) C. (c) D. (d)
Answer» While moving from position-x to position-y, the lungs are exhaling out the air. When lungs exhale out the air, both diaphragm & external intercostal muscles relax.

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