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Question

In expiration condition, diaphragm becomes


A
Circular
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B
Relaxed
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C
Fully contracted
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D
Expanded
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Solution

The correct option is B Relaxed
During expiration, the diaphragm becomes relaxed and becomes dome-shaped which leads to a reduction in the intrathoracic space. Hence, the air is forced out from the lungs following the pressure gradient.
So, the correct answer is 'Relaxed'.

Biology

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