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Expiration

Which of the ...

Question

Which of the following does not happen during exhalation?

A

The space in chest cavity decreases

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B

Diaphragm goes up

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C

Air is released

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D

Ribs are pushed upward and outward

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Solution

The correct option is D Ribs are pushed upward and outward
During exhalation diaphragm relaxes.
The intercoastal muscles also relax.
This makes ribs to move down and in.
It reduces the volume of the chest cavity and the air is pushed out
So, the correct option is 'Ribs are pushed upward and outward'.

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During inhalation, the ribs move up and outward and the diaphragm moves in. this movement decrease the space in our chest cavity and the air rushes in. During exhalation, the ribs moves down and inward and the diaphragm moves up. This movement increases the space in our chest cavity and the air is pushed out.

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