Term
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Definition
| How well cells, tissues and organs supplied with oxygen |
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Term
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Definition
- Get O2 into the body
- Circulate O2 through the body
- Use O2 properly and rid body fo CO2
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Term
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Definition
Consists of Inhalation and Exhalation |
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Term
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Definition
| alveolar-capillary gas exchange |
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Term
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Definition
| capillary-tissue gas exchange |
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Term
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Definition
| Process of moving gases in and out of the lungs |
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Term
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Definition
Coordination of muscles Major inspiratory muscle: diaphragm |
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Term
| work of breathing determined by |
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Definition
rate and depth of breathing degree of compliance of lungs airway resistance presence of active expiration use of accessory muscles |
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Term
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Definition
| an active process, stimulated by chemical receptors in the aorta |
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Term
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Definition
normally passive process that depends on the elastic recoil of the lungs |
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Term
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Definition
| produced by elastic fibersi n the lung and by surface tension in the fluid film lining alveoli |
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Term
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Definition
the chemical produced by alveolar type 2 cells that maintains the surace tension of the alveoli and keeps them from collapsing |
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Term
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Definition
| rate and delpth of breathing increase enough to move large amount of air through lungs |
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Term
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Definition
- increased rate and depth of respiration
- bentilation greater than that whichi is required to eliminate normal CO2 levels
- more CO2 eliminated
- excess CO2 exhalation can lead to loss of consciousness
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Term
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Definition
| decreased rate or depth of breathing moves only small amount of air in and out of lungs |
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Term
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Definition
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Term
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Definition
| low oxygen levels in the tissue |
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Term
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Definition
Early Sign: rapid pulse, rapid shallow respirations, dyspnea, flaring of nostrils, restlessness |
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Term
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Definition
| ability of lungs to distend or expand in response to increased intra-alveolar pressure |
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Term
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Definition
| Tendency of elastin fibers to return to their original position after being stretched |
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Term
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Definition
resistance to airflow within the airways - the larger the diameter of the airway, more easily air flow through it
the pressure difference between the mouth and the alveoli in relation to the rate of flow of inspired gas |
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Term
Alveolar-Capillary gas exchange |
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Definition
| method of transport is simple diffusion: molecules move from area of greater to lesser concentration |
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Term
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Definition
effected by pressure: the higher the O2 pressure in alveoli, faster oxygen diffuses into blood thickness of the membrane condition of surface area CO2 diffuses 20x faster than O2 |
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Term
| Capillary-Tissue Gas exchange |
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Definition
Occurs in body organs and tissues Requires adequate external respiration and peripheral circuatlion or tissue hypoxia may occur |
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Term
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Definition
Chemoreceptors in medulla, carotid arteries and aorta Blood CO2 level provides primary stimulus to breathe Secondary stimulus is hypoxemia |
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Term
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Definition
Depends on: Ventilation Perfusion Oxygen-carrying capacity |
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Term
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Definition
| Hemoglobin carries 97% of diffused O2 |
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