Definitions & Random info

Definitions & Random info - Alveoli: Respiratory...

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Alveoli: Respiratory airway terminals where most gas exchange with the pulmonary circulation takes place. Diffusion: The process whereby a material moves from a region of higher concentration to a region of lower concentration. BTPS: Body temperature (37°C) and standard pressure (1 atm), saturated (6.28 kN/m2). FIGURE 7.8 Typical system conFguration for the measurement of rebreathing pulmonary diffusing capacity. © 2000 by CRC Press LLC Chemoreceptors: Neural receptors sensitive to chemicals such as gas partial pressures. Dead space: The portion of the respiratory system that does not take part in gas exchange with the blood. Expiration: The breathing process whereby air is expelled from the mouth and nose. Also called exhalation. Functional residual capacity: The lung volume at rest without breathing. Inspiration: The breathing process whereby air is taken into the mouth and noise. Also called inhalation. Mass spectrometer: A device that identiFes relative concentrations of gases by means of mass-to-charge ratios of gas ions. Mechanoreceptors: Neural receptors sensitive to mechanical inputs such as stretch, pressure, irritants, etc. Partial pressure: The pressure that a gas would exert if it were the only constituent. Perfusion: Blood ±ow to the lungs. Plethysmography: Any measuring technique that depends on a volume change. Pleura: The membrane surrounding the lung. Pneumotach: A measuring device for air±ow. Pulmonary circulation: Blood ±ow from the right cardiac ventricle that perfuses the lung and is in
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intimate contact with alveolar membranes for effective gas exchange. STPD: Standard temperature (0°C) and pressure (1 atm), dry (moisture removed). Ventilation: AirFow to the lungs. 1. respiration - the release of energy in cells by the combination of food and oxygen 2. gills - organs used by water animals to obtain oxygen from the water 3. spiracles - holes along the abdomen of insects used to take in oxygen 4. carbon dioxide - a gaseous waste product of respiration which is exhaled from animals 5. mucus - a sticky substance produced by the nose to moisten the inhaled air and trap dust and bacteria 6. cilia - microscopic hairlike structures that help move mucus and other substances in the respiratory track 7. esophagus - the tube leading to the stomach from the throat
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9. epiglottis - a flap that covers the trachea while food is swallowed; this prevents food from going into the trachea and lungs 10. larynx - the part of the throat that contains the voice box or vocal cords 11. bronchi - the main branches of the respiratory tract leading into the lungs 12. alveoli - tiny sacs at which gas exchange takes place in the lungs 13. diaphragm - a muscle on the underside of the lungs; when it contracts and relaxes, it sets up the conditions of low and high air pressure that permit air to be inhaled and exhaled from the lungs 1. The respiratory system is designed to obtain oxygen from the air and remove the waste product carbon dioxide from the body. 2. Respiration is the combining of food and oxygen to release
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This note was uploaded on 11/13/2010 for the course CODS 361 taught by Professor Gel during the Spring '10 term at WPUNJ.

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Definitions & Random info - Alveoli: Respiratory...

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