| Indicate whether the statement is true or false. |
1. The pneumotaxic and apneustic centres are located in the cerebellum.
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2. In the absence of pulmonary surfactant, smaller alveoli display a larger inward-directed pressure than do larger alveoli.
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3. Administering O2 to patients with severe chronic lung disease will not depress their drive to breathe.
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4. Newborn respiratory distress syndrome is caused by an excess of pulmonary surfactant.
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5. The inspiratory and expiratory neurons both display pacemaker activity.
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6. During hyperventilation, arterial PCO2 levels decrease because CO2 is blown off more rapidly than it is being produced in the tissues.
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7. The 500 mL of air that is inspired is the same 500 mL of air that enters the alveoli during a single breath.
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8. The peripheral chemoreceptors are not activated during carbon monoxide poisoning despite the fact that the total O2 content in the blood can become lethally low.
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9. Increased acidity at the tissue cells stimulates increased dissociation of oxyhaemoglobin.
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10. Exhaled air passes from the larynx through the trachea.
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11. If there is a deficient supply of pulmonary surfactant, the lungs become more compliant.
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Answer Key
1. False
2. True
3. False
4. False
5. False
6. True
7. False
8. True
9. True
10. False
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