1. The superior opening into the larynx is called the _______________.

2. Within each lung, the airway forms a branching complex called the _______________.

3. The great alveolar cells secrete a lipoprotein called _______________.

4. Intrapulmonary pressure must be greater than _______________ pressure for inspiration to occur but greater than _______________ pressure for expiration to occur.

5. _______________ disorders reduce the flow of air through the airway.

6. Some inhaled air does not participate in gas exchange because it fills the _______________ of the respiratory tract.

7. Inspiration depends on the ease of pulmonary inflation, called _______________, whereas expiration depends on _______________, which causes pulmonary recoil.

8. Inspiration is caused by the firing of I neurons in the _______________ of the medulla.

9. The matching of airflow to blood flow in any region of the lung is called _______________.

10. A blood pH > 7.45 is called _______________; it can be caused by a CO₂ deficiency called _______________.

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