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Inspiration

Inspiration i...

Question

Inspiration is initiated by the contraction of?

A

External intercostal muscles

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B

Internal intercostal muscles

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C

Diaphragm

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D

Both a and b

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Solution

The correct option is D Diaphragm
Inspiration is the phase of ventilation in which air enters the lungs. It is initiated by contraction of the respiratory muscles: diaphragm- flattens, extending the superior/inferior dimension of the thoracic cavity.
So, option C is the correct option.

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