passpadi

2006

Biology

67ca00ce0c643c71d77dee1f

An increase in air pressure in the lings is due to the

A.

increase in the volume of the thoracic cavity

B.

relaxation of the diaphragm

C.

upward movement of the ribs

D.

contraction intercostal muscles

Correct Answer: relaxation of the diaphragm

Explanation

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