During inspiration, the diaphragm ____ and ____ the volume of the thoracic cavit

Biology
Tutor: None Selected Time limit: 1 Day

a.contracts; decreases; inward

b.ontracts; increases; inward

c.relaxes; decreases; inward

d.relaxes; decreases; outward

e.relaxes; increases; inward

May 10th, 2015

Answer is B

During inspiration the diaphram muscle contracts it flattens out and drops down out of the chest cavity making more room and creating a vaccum -- air then rushes into the lungs.

May 10th, 2015

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