Question

The width of the chest during inspiration :

• A. Decreases
• B. Does not change
• C. Increases
• D. None of these

Answer 1

Answer: (B)

Does not change

• When you breathe in, or inhale, your diaphragm contract and move downward. This increases the space in the chest cavity into which lungs expand.
  
• The intercostal muscles between ribs also help enlarge the chest cavity.

So, the correct option is 'Does not change'.