iphy 3430 2-15-11

iphy 3430 2-15-11 - IPHY 3430 Review:During...

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IPHY 3430 2-15-11
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Review: During inhalation/exhalation at rest: pressure differential of about 1 mm 759 mmHg 760 Inhalation at rest 761 760 Exhalation at rest
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Review: During exercise, pressure differentials greater than 1 mm generated due to greater numbers of muscles contracting with greater force, resulting in larger expansion of thoracic cavity and lungs. 750 760 mmHg 770 760 Exhalation Inhalation
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So,…. . Quiet breathing: 500 ml x 12 b/m = 6 L/min Exercise: 2300 ml x 40-50 b/m = 100-120 L/ min
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Factors that can affect gas exchange by influencing flow and lung volume Air Flow = P/ resistance SNS --bronchodilation PNS--bronchoconstriction Chronic obstructive pulmonary disease (COPD) Asthma,emphysema, chronic bronchitis Factors that reduce lung volume: pneumonia, cancer, tuberculosis
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Between outside air and lungs= convection Between alveolar air and blood = diffusion Diffusion rate = P x surface area x solubility coefficient distance x M.W. 1/2
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This note was uploaded on 02/23/2011 for the course IPHY 3430 taught by Professor Lynch,robe during the Spring '08 term at Colorado.

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iphy 3430 2-15-11 - IPHY 3430 Review:During...

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