Term
| A collection of air within the pleural cavity that causes the lungs to collapse is ... |
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Definition
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Term
| Intrapleural pressure is less or more than intrapulmonary pressure |
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Definition
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Term
| Air moves out of the lungs during expiration because |
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Definition
| Intrapulmonary pressure is greater than atmospheric pressure |
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Term
| Which of the following events occurs first during inspiration? |
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Definition
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Term
| What contributes the efficiency of gas exchange? |
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Definition
| large surface area, speed of diffusion, lipid soluble gases, and thin respiratory membrane |
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Term
| Why do we have millions of alveoli in each lung? |
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Definition
| to increase the surface area for gas exchange |
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Term
| What is true of lung expansion? |
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Definition
| it creates an inward tension that makes lung expansion difficult. |
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Term
| Why are lungs internalized in terrestrial animals? |
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Definition
| because gas exchange requires a wet surface |
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Term
| Which of the following best accounts for shortness of breath on top of a mountain? |
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Definition
| lower atmospheric pressure |
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Term
| Which of the following decreases the concentration of oxygen in the alveolar air? |
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Definition
| addition of water vapor and carbon dioxide |
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Term
| Consider the following mixture of gases: 20% oxygen, 40% carbon dioxide, and 40% nitrogen. What is the partial pressure of oxygen with a total pressure of 1000 mmHg? |
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Definition
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Term
| Consider a situation in which the left lung is poorly ventilated, thus decreasing the partial pressure of oxygen to 80 mmHg. What would be the partial pressure of oxygen in the blood leaving the left lung? |
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Definition
| 80 mmHg as equilibrium is achieved |
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Term
| Which of the following is the best description of blood leaving the metabolizing tissues and returning to the lungs? |
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Definition
| oxygen poor and carbon dioxide rich |
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Term
| what is external respiration? |
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Definition
| gas exchange across the respiratory membrane in the lungs |
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Term
| Partial pressure is directly proportional to both |
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Definition
| concentration and pressure |
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Term
| Why is the small amount of dissolved oxygen important for oxygen transport? |
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Definition
| oxygen must be dissolved in plasma before it can go to a red blood cel |
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Term
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Definition
| amount of air inhaled or exhaled during resting conditions (TV) we are at rest when we watch tv |
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Term
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Definition
| the maximum amount of air that can be forced out after a maximum inspiratory effort. VC |
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Term
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Definition
| amount of air remaining in lungs after a forceful expiration |
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Term
| what is total volume capacity? |
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Definition
| maximum amount of air contained in the lungs after a maximum inspiratory effort |
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Term
| Which of the following are the hairs within the nasal cavity that filter coarse particles, such as pollen and dust, from inspired air |
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Definition
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Term
| is the inflammation of the nasal mucosa accompanied by excessive mucus production, nasal congestion, and postnasal drip. |
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Definition
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