Term
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Definition
| amount of air inhaled or exhaled with each breath under resting conditions |
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Term
| what is the average TV for males and females? |
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Definition
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Term
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Definition
| inspiratory reserve volume |
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Term
| define Inspiratory reserve volumes |
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Definition
| amount of air that can be forcefully inhaled after a normal tidal volume inhalation |
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Term
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Definition
| expiratory reserve volume |
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Term
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Definition
| expiratory reserve volume |
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Term
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Definition
| amount of air that can be forcefully exhaled after a noraml tidal volume exhalation |
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Term
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Definition
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Term
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Definition
| amount of air remaining in the lungs after a forced exhalation |
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Term
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Definition
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Term
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Definition
| max amount of air contained in the lungs after a max inspiratory effort: TLC=TV+IRV+ERV+RV |
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Term
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Definition
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Term
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Definition
| max amount of air that can be expired after a max inspiratory effort: VC=TV+IRV+ERV |
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Term
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Definition
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Term
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Definition
| max amount of air that can be inspired after a normal expiration. IC=TV+IRV |
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Term
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Definition
| functional residual capacity |
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Term
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Definition
| volume of air remaining in the lungs after a normal tidal volume expiration: FRC=ERV+RV |
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Term
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Definition
| the ease with which lungs can be expanded; specifically, the measure of the change in lung volume that occurs with a given in transpulmonary pressure |
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Term
| what two main factors determine lung compliance? |
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Definition
-distensibility of the lung tissue and surrounding thoracic cage
-surface tension of the alveoli |
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Term
| what is Alveolar ventilation rate (AVR)? |
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Definition
| measures the flow of fresh gases into and out of the alveoli during a particular time interval; AVR (ml/min)= frequency (breaths/min) X TV-dead space ( ml/breath) |
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Term
| slow, deep breathing ______ AVR and rapid, shallow breathing ________ AVR |
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Definition
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Term
| what is the sequence of events for inspiration? |
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Definition
| 1. inspiratory muscle contract, 2. thoracic cavity volume increases, 3. lungs stretched;intrapulmonary volume increases 4. intrapulmonary pressure drops 5. air flows into the lungs down its pressure gradient until intrapulmonary pressure is equal to 0 |
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Term
| describe the sequence of events for expiration. |
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Definition
| 1. inspiratory muscles relax 2. thoracic cavity volume decreases, 3. elastic lungs recoil passively; intrapulmonary volume decreases, 4. intrapulmonary pressure rises, 5. air flows out of lungs down its pressure gradient until intrapulmonary pressure is 0 |
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Term
| what is the major non-elastic source of resistance to airflow? |
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Definition
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Term
| what is the relationship between flow, pressure, and resistance? |
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Definition
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