RESPIRATORY SYSTEM Multiple Choice. Read each item carefully. Circle the letter of the correct answer.

1. Tiny hairs lined inside the nose prepare air for the lungs by
a. cleaning it
c. moistening it
b. drying it
d. warming it

2. How does the body use the energy released in its cells?
a. to rest the body
b. to lower body temperature
c. for making oxygen
d. for muscles to move

3. When you exhale, the diaphragm helps air leave the body by
a.expanding the lungs
b. making the chest larger
c. pushing air into te lungs
d. making the chest smaller

4. The body's cells use oxygen to break sugar into
a. Oxygen and water
b. Carbohydrates and water
c. protein and water
d. carbon dioxide and water

5. What happens when you breathe in air?
a. The diaphragm expands and the ribcage contracts.
b. The diaphragm contracts and the ribcage expands.
c. The diaphragm expands and the ribcage collapses.
d. The diaphragm contracts and the ribcage remains the same.​