1. Which of the following is not true? A. Heart rate in a healthy human adult is 60-64 beats per minute. B. Oxygen is transported to various parts of the body through blood. C. White blood cells help the body fight against infections. D. Platelets play an important role in clotting of blood.   A   C   B   D   Hint Half-n-half Clue   2. Which of the following helps keep the human body cool? A. Respiration B. Mastication C. Perspiration D. Urination   A   B   C    D   Half-n-half Clue   3. Food descends from the mouth to the stomach through the   esophagus   larynx   small intestine   trachea   Half-n-half Clue   4. _______ are formed by the division of trachea.   Bronchi   Bronchioles   Air sacs   Ureters   Half-n-half Clue   5. True or false: Exchange of air takes place in the lungs.   True   False   6. Larger dust particles in the inhaled air are trapped in the   nose   pharynx   epiglottis   larynx   Half-n-half Clue   7. True or false: CO2 is formed as a waste product during respiration.   True   False   Skip to Diagrammatic repr... ⇒