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Physiology Practice Test: The Respiratory System - Pulmonary Ventilation
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Pulmonary ventilation is the process of air flowing into and out of the lungs. It's also known as breathing.  Air flows into the lungs during inhalation and out of the lungs during exhalation. This happens because of pressure differences between the atmosphere and the gases inside the lungs.  The volume of pulmonary ventilation is the total amount of air exhaled after maximal inhalation. It's about 4800mL and varies according to age and body size.  The ease of air passage and the amount of energy required for ventilation are influenced by three physical factors: Airway... Show more
Physiology Practice Test: The Respiratory System - Pulmonary Ventilation
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25 Questions

1. The conducting zone adjusts the temperature and humidity of the air entering the respiratory tract.
2. Obstructive pulmonary disorders are characterized by an interference with the expansion of the lungs.
3. Which of the following chemicals will NOT result in a decrease in airway resistance?
4. The surface tension of the alveolus is reduced by surfactants produced by what type of cells?
5. Which of the following is true when the lung volume is equal to the functional residual capacity?
6. Internal respiration refers to the use of oxygen and production of carbon dioxide by cells.
7. What are the smallest (and most distal) structures that remain a component of the conducting zone in the respiratory tract?
8. Transpulmonary pressure is the difference between intra-alveolar pressure and intrapleural pressure.
9. What type of cells secrete mucus in the respiratory tract?
10. What is the connective tissue surround each lung called?
11. A healthy person can normally exhale what percentage of his/her vital capacity in one second?
12. What is the term for the volume of air moved into the lungs every minute?
13. Which of the following occurs when intra-alveolar pressure exceeds atmospheric pressure?
14. Which of the following becomes more abundant deeper into the conducting zone (from bronchi to bronchioles) .
15. Which of the following is NOT part of the response of an airway to specific allergens that initiate an asthmatic response?
16. The lung is expanded during inspiration by the transpulmonary pressure that pulls on the lung as the chest wall expands.
17. How do tractive forces affect the airways during inspiration.
18. As the volume of the chest wall increases, the concomitant expansion of the lungs is due to a(n) ________.
19. Alveolar macrophages function to engulf pathogens and foreign particles that have been inhaled into the lungs.
20. The distending pressure across the lungs is the intrapleural pressure.
21. Which of the following is NOT a function of the respiratory system?
22. As the lungs expand, intra-alveolar pressure ________ and air moves ________ the lungs.
23. The decrease in transpulmonary pressure during expiration reduces the distending forces on the airways.
24. Air flows between alveoli through pores.
25. What are the most common cells that line the surface of the alveoli and are therefore associated with the exchange of gases within the lungs?

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