1. True or False: Two-layered membrane which covers the lungs is known as pericardium.   True   False   2. Exchange of air occurs in _______ which are also known as 'air sacs'.   Bronchi   Alveolar ducts   Bronchioles   Alveoli   Hint Half-n-half Clue   3. Which cells of the blood carry oxygen to different parts of the body?   E   Alveoli   Red blood cells   B   Half-n-half Clue   4. True or False: Breathing through the mouth is considered as good as breathing through the nose.   True   False   5. Complete the equation: Glucose + Oxygen = _______ + Water + CO2   Starch   None of these   Sucrose   Energy   Half-n-half Clue   6. Normal rate of respiration in an adult human being is _______ times/ minute. A. 10-12 B. 12-14 C. 16-18 D. 22-24   A   B   C   D   Half-n-half Clue   7. Which process does not occur in the nasal cavity? A. Trapping of large foreign bodies B. Exchange of gases C. Humidification of inhaled air D. Warming of inhaled air   A   B   C   D   Half-n-half Clue