KINE 3012 Lecture Notes - Lecture 7: Partial Pressure, Hyperpnea, Perfusion
19 Jan 2016
School
Department
Course
Professor
Document Summary
Lower driving pressure for o2 due to less atmospheric pressure. Pressure differences in alveoli leads to gas transfusion. Volume of gas dissolved in a liquid is proportional to the partial pressure of the gas. Cgas = concentration of gas in a liquid (ml/dl) K= solubility coefficient of the gas in the liquid. Important because gases are transmitted between alveoli (air) and blood (liquid) Nitrogen has a greater effect under sea levels. The bends --- come up slowly to acclimate nitrogen because it has high k solubility and the driving pressure is high. Different than increase in respipration that occurs with exercise. Hyperpnea increse ventialtion = increase co2 cproduction: hypoventiatlion. Want to match ventilation (air flow) + perfusion (blood flow q) More blood in bottom of long due to gravity. 1. 4ml o2/ ghb x 15 g hb/ 100 ml blood. = 21 ml o2 / 100 ml blood. 5000 ml blood/min x 21ml o2/ 100 ml blood.
