1. True or False: Trachea contains 16-20 'C'-shaped cartilaginous rings.   True   False   2. True or False: Exhalation and inhalation of air is known as "cellular respiration".   True   False   3. Which cells of the blood carry oxygen to different parts of the body?   B   Red blood cells   C   D   Hint Half-n-half Clue   4. True or False: Breathing through the mouth is considered as good as breathing through the nose.   True   False   5. Spirometer measures: A. Capacity of lungs B. Volume of air inhaled and exhaled C. Residual air D. All of these   A   B   C   D   Half-n-half Clue   6. True or False: Two-layered membrane which covers the lungs is known as pericardium.   True   False   7. Exchange of air occurs in _______ which are also known as 'air sacs'.   Bronchioles   Alveolar ducts   Bronchi   Alveoli   Half-n-half Clue