HTHSCI 1H06 Lecture Notes - Lecture 10: Quadratus Lumborum Muscle, Abdominopelvic Cavity, Abdomen
15 Feb 2017
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Document Summary
Ventilation mechanics: ventilation (definition; boyles law: pv=k) where increase in pressure=decrease in volume. Boyles law: pv=k (pressure x volume = constant) Increase volume = decrease pressure: decrease volume = increase pressure. Difference in air pressure drives movement of air into and out of lungs: respiration (definition; significance of partial pressure) Respiration: exchange of gasses (o2 and co2) Happens at many levels: tissues (respiring, between tissue and blood, between blood and lungs. A: gas exchange between the air within the alveoli and the pulmonary capillaries occurs by diffusion . The oxygen must first dissolve before passing through the respiratory epithelium. Gas moves from a region of high partial pressure to a region of low partial pressure, down a partial pressure gradient: tissue respiration: Aerobic (presence of oxygen) vs anaerobic (absence of oxygen) Breaking down fuel in the presence of o2. Refers to o2 utilization and co2 production by metabolizing tissues.
