Term
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Definition
1. respiratory zone: gas exchange
2. conduction zone: gets air into respiratory zone |
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Term
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Definition
1. ventilation (breathing)
2. gas exchange btwn blood/lungs and btwn blood/tissues |
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Term
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Definition
1. diffusion
2. higher O2 concentration in lungs, so diffuses into blood
3. higher CO2 conc. in blood, so diffuses out |
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Term
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Definition
1. air sacs in lungs where gas exchange happens
2. 300 million of them |
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Term
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Definition
| 1. 95-97% total surface area where gas exchange occurs |
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Term
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Definition
| 1. secrete pulmonary surfactant and reabsorb sodium and water |
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Term
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Definition
1. heart, trachea, esophagus, and thymus
2. lungs fill the rest of the cavity |
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Term
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Definition
| 1. air moves from higher to lower pressure |
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Term
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Definition
| 1. intrapulmonary pressure is lower than atmospheric pressure |
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Term
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Definition
| 1. intrapulmonary pressure is greater than atmospheric pressure |
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Term
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Definition
| lwoer than intrapulmonary and atmospheric pressure in both inhalation and exhalation |
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Term
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Definition
| pressure of gas is inversely proportional to its volume |
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Term
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Definition
| lungs return to initial size after being stretched |
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Term
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Definition
1. resists distension
2. exerted by fluid secreted in alveoli
3. raises pressure of alveolar air |
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Term
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Definition
1. excreted by type II alveolar cells
2. reduces surface tension btwn water molecules
3. prevents collapse |
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Term
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Definition
| 1. amount of air expired or inspired in quiet breathing |
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Term
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Definition
| 1. maximum amount of air that can be forcefully exhaled after a maximum inhalation |
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Term
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Definition
| 1. amount of gas in the lungs after a max. inspiration |
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Term
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Definition
lung tissue is damaged
vital capacity reduced
forced expiration normal
ex: emphysema |
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Term
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Definition
lung tissue normal
vital capacity normal
forced expiration reduced
ex: asthma |
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Term
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Definition
1. pressure of an individual gas
2. = % of that gas X total pressure |
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Term
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Definition
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Term
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Definition
- low pH
respiratory acidosis: hypoventilation
metabolic acidosis: loss of bicarbonate, excessive acid production |
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Term
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Definition
high blood pH
- respiratory alkalosis: hyperventilation / low CO2
- metabolic acidosis: overproduction of bicarbonates |
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