Question

Thoracic breathing takes place during

i) Emergency situation

ii) Vigorous exercise

iii) Rest and sleep

• A. Only i is correct
• B. Only ii is correct
• C. i and ii are correct
• D. ii and iii are correct

Answer 1

The correct option is C

i and ii are correct

The correct option is C.

Explanation of the correct option:

1. Normal breathing is abdominal breathing.
2. Abdominal breathing is done by using the diaphragm.
3. Thoracic breathing is done by using external intercostal muscles.
4. It takes place during emergency situations and vigorous exercise as in those conditions our body requires excess amount of oxygen.

Final answer: Thoracic breathing takes place during emergency situation and vigorous exercise. So, i and ii are correct.