HTHSCI 1H06 Lecture Notes - Lecture 12: Internal Intercostal Muscles, Tidal Volume, Rib Cage

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Peter Helli

Document Summary

Movement of air into and out of the lungs. Anatomy- skeletal muscular makeup of the thoracic cage. Mechanics- what causes the air to flow in/out. Exchange of gasses (oxygen and carbon dioxide) You cannot have respiration at the tissues without ventilation. Refers to oxygen utilization and carbon dioxide production by metabolising tissues- requires some sort of fuel source to do this. Vo2 = rate at which you consume oxygen. Vo2 increases with exercise (depends on fitness) Vco2 depends on fuel source and metabolism. E. g carbohydrates (cho) as fuel source (1:1 ratio) 1 o2 +cho h20 + 1 co2 vco2= vo2. 1 o2 + fat h20 + 0. 7 co2 vco2= 0. 7 x vo2. Combined cho and fats vco2= 0. 85 x vo2. We rarely use proteins as fuel (would generate 0. 8 co2 molecules) Refers to the production of atp without the utilization of oxygen. Carbohydrates lactic acid (la: h) la- + h+