Question

All of the statements given below regarding inhalation in humans are correct except one. Which one is NOT correct?

1. a) Ribs move inward and diaphragm is raised.
2. b) Ribs are lifted up and diaphragm becomes flat.
3. c) Chest cavity becomes larger.
4. d) Air is sucked into the lungs.

• A. None of these
• B. i only
• C. All
• D. iv only

Answer 1

Answer:

B. i only

• During inhalation, the ribs move up and outward and the diaphragm moves in.

• This movement decrease the space in our chest cavity and the air rushes in.

• During exhalation, the ribs moves down and inward and the diaphragm moves up.

• This movement increases the space in our chest cavity and the air is pushed out.