lecture_notes_28_(ta)

lecture_notes_28_(ta) - Lecture 28: Respiratory Physiology...

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- this function is performed by the circulatory system - this function is performed by the circulatory system Lecture 28: Respiratory Physiology I Reading: ch 13, section: intro, mechanics, pgs 451-463 (pgs 459-471, if using 5 rd edition) Respiration - Respiration, the process of obtaining O 2 from the environment and eliminating CO 2 from the body, can be subdivided into 2 separate processes (Figure 13-1) . ( 1 ) internal respiration - this refers to the intracellular metabolic processes that take place within mitochondria, which use O 2 and produce CO 2 during the derivation of energy from nutrient molecules. ( WE WILL NOT CONCENTRATE ON INTERNAL RESPIRATION HERE , ALTHOUGH IT HAS BEEN MENTIONED BEFORE IN THIS CLASS . O XIDATIVE P HOSPHORLATION IS CRITICAL FOR NORMAL PHYSIOLOGICAL HOMEOSTASIS . ) ( 2 ) external respiration - this refers to the entire sequence of events involved in exchanging O 2 and CO 2 between the environment and the cells of the body. It is composed of four subprocesses, the first two of which are accomplished by the respiratory system . 1) breathing - the alternate movement of air in and out of the lungs to exchange gas between the environment and the alveoli ( SMALL CAVITIES IN THE LUNGS ) . 2) alveolar gas exchange ( “ AV - E - O - LAR ”) - exchange of O 2 and CO 2 between gas in the alveoli and blood in the pulmonary capillaries 3) gas transport - the transport of O 2 and CO 2 by the blood from the lungs to the tissues of the body 4) blood gas exchange - the exchange of O 2 and CO 2 between the blood and the tissues ( 1 AND 2 TAKE PLACE IN THE RESPITORY SYSTEM , 3 & 4 TAKE PLACE IN THE CIRCULATORY SYSTEM )
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( NEW TOPIC ) Respiratory system - t he system responsible for the first two stages of external respiration (Figure 13-2) . Respiratory Airways - these are the tubes that carry air between the atmosphere and the alveoli. nasal passages - nose pharynx - common passageway for the lungs and the stomach larynx - ( SLITLIKE ) voice box located at the entrance to the trachea ( JUST BELOW THE PHARYNX , THIS IS THE FIRST SOLELY RESPIRATORY STRUCTURE ) trachea - tube through which air is conducted to the lungs ( CARTILAGE
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This note was uploaded on 05/02/2008 for the course NPB 101 taught by Professor Fuller,charles/goldberg,jack during the Winter '08 term at UC Davis.

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lecture_notes_28_(ta) - Lecture 28: Respiratory Physiology...

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