Kinesiology 3330F/G Study Guide - Midterm Guide: Lactate Threshold, Indirect Calorimetry, Oxidative Phosphorylation
21 Mar 2017
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Introduction to the powerlab: pulmonary ventilation, pulmonary gas exchange o2, output co2. Douglas bag: collect expired air in the douglas bag, measure the air composition with the spirolab. Ve atps measured expored volume in l/min (often collected at l/s and multiplied) Feo2 fractional concentration of oxygen in expired air. Feco2 fractional concentration of carbon dioxide in expired air. Troom room temperature tcoll collection time. Fen2 = 100% - sum of feo2 and feco2. Lab plotting: vo2 vs work rate, shows the plateau, show the slope above and below lactate threshold, gain = vo2/work rate, efficiency = work rate / vo2. There is a difference between atp utilization and atp produced by oxidative phosphorylation met by substrate level phosphorylation: lactate threshold: Mechanical efficiency: reflects relative amount of chemical energy expended that contributes to external work with the remainder lost as heat.
