BIOL10004 Lecture 8: Module 3 Gas-Exchange2F-Respiration
Document Summary
Animals rely mostly on aerobic metabolism (requiring o2) to sustain their resting energy requirements. N2, co2 not utilised for energy production. 20x more atp is synthesised by aerobic compared to anaerobic metabolism. Oxidation of the end-products of glycolysis (by o2 in eukaryotes) Ventilation = movement of the medium (air, water) over a gas exchange surface. Moving the lungs physically, always surrounded by water. Ram ventilation= respiratory flow thats created in some fish by opening the mouth during swimming-> water flows through mouth and across gills. = the bulk flow of a fluid (air or water) perfusion= internal convection, responsible for transporting o2 from the site of gas exchange to cells. More detail in gas exchange surface biobyte. Conductance across a membrane= directly proportional to permeability (chemical, physical properties), surface area, difference in partial pressure. + = inversely proportional to thickness (diffusion distance) Co2 is 20x more soluble in water than o2.
