Kinesiology 2230A/B Lecture Notes - Lecture 9: Pulmonary Artery, Pulmonary Vein, Pulmonary Circulation
3 Sep 2018
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Ve/vo2 increases with heavy exercise reserve: ratio increases, whatever ventilation you require for o2 consumption, your ventilation is increasing at a faster rate than o2 consumption, ventilation over and above oxygen you require. Increase in ventilation > that which is required. If pp is high (close to 100mmhg), then saturation of hb will be high; ppo2 dictates how much o2 hb will carry: fatigue not caused by not being able to move more air in and out of lung. Oxygen consumption is influenced by hr and sv: co portion. Vo2 of the brain can double during cerebral activity (20w) Resistance vessels: arteries; diameter can change very quickly with exercise, blood gets redistributed during exercise, redistribution happens during exercise. Capacitance vessels: veins; where the blood volume is mostly located at rest: ability to increase their capacity; balloon out, blood sits there until exercise.
