Biological Sciences 55-205- Midterm Exam Guide - Comprehensive Notes for the exam ( 16 pages long!)

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C h a p t e r 1 1 t h e r e s p i r a t o r y s y s t e m: describe the functional anatomy of the respiratory system. The primary function of respiration is to obtain o2 for use by the body cells and to eliminate the co2 the cells produce: define atmospheric pressure, alveolar pressure, and pleural pressure. Atmospheric (barometric) pressure is the pressure exerted by the weight of the air in the atmosphere on objects on earth"s surface. At sea level it equals 760 mm hg. Atmospheric pressure diminishes with increasing altitude above sea level as the layer of air above earth"s surface correspondingly decreases in thickness. Minor fluctuations in atmospheric pressure occur at any height because of changing weather conditions (that is, when barometric pressure is rising or falling). Intra-alveolar pressure, also known as intrapulmonary pressure, is the pressure within the alveoli.

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