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BE
Question Practice

What initiates the decrease in thoracic volume during expiration?

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MCQ_SA
CBSE
Class 11
Biology
Biology
Breathing and Exchange of Gases
Question Bank

What initiates the decrease in...

Single Answer MCQ
Q-00056340

What initiates the decrease in thoracic volume during expiration?

1

Contraction of abdominal muscles

2

Relaxation of diaphragm and intercostal muscles

3

Increased lung volume

4

Filling of pleural cavity

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