PHS 3342 Lecture Notes - Lecture 2: Alveolar Cells, Surface Tension, Brainstem

• School: University of Ottawa
• Department: Physiology
• Course: PHS 3342
• Professor: Jacqueline Carnegie

Document Summary

3. 8 l: expiratory reserve volume (erv, residual volume* (rv) , functional residual capacity* (frc = erv + rv) , vital capacity (vc = tv + irv + erv), total lung capacity* 6. 0 l: * these volumes cannot be measured directly with a spirometer. Helium dilution method: before we begin: if concentration = amount/volume, then concentration x volume = amount. C1 is the initial concentration of helium, v1 is the volume of the apparatus, c2 is the concentration of helium after equilibration and v2 is the lung volume we are seeking to measure. Ideal gas law: boyle"s law, describes how the pressure of a gas tends to decrease as the volume of a gas increases (and vice versa) at a constant temperature. / lungs in order to decrease the pressure within the lungs: what we use natural, drop pressure inside the body to bring air in and increase pressure to breathe air out.