HLSC 1201U Lecture Notes - Lecture 9: Respiratory Minute Volume, Perfusion, Partial Pressure
Document Summary
Chapter 36 37: physiology of the respiratory system. Pressure difference causing air movement from high to low. Boyle"s law: volume of gas varies inversely with pressure: as volume gets smaller, pressure increases, as volume gets bigger, pressure decreases, air moves from areas of high pressure to areas of low pressure. In order to get air into our lungs, alveolar pressure needs to be lower than atmospheric pressure so air moves into the lungs. In order to get air out of our lungs, alveolar pressure needs to be higher than atmospheric pressure: alveolar pressure can be decreased by increasing lung volume, alveolar pressure can be increased by decreasing lung volume. In order to get air out of our lungs, alveolar pressure needs to be higher than atmospheric pressure. Compliance ability of pulmonary tissues to stretch, thus making inspiration possible (how easy it is to move the muscle: aided by surfactant.
