AP 2 0.0 / 5 ? BiologyRespiratory physiologyUniversityAll boards Created by: ellamarshall1Created on: 19-12-16 11:39 When was o2 first released and by what? 3000mya by prokaryote heterotrophs 1 of 12 When did sinks become full of o2? 2000mya 2 of 12 What is o2 toxicity? Production of harmful free radicals e.g. H202 or OO- 3 of 12 How are Free radicals combated? Antioxidants and enzymes producing peroxidase 4 of 12 What is Daltons law of partial pressures? Total pressure in a container of mixed gases= sum of all gases pressure 5 of 12 What is boyles law? As volume increases pressure decreases 6 of 12 What is the haldane effect? Haemoglobin thats released o2 binds CO2 better 7 of 12 Where is myoglobin found? Found storing o2 in vertebrate muscles, or in blood after muscle injury 8 of 12 What is the open flow/co current gas exchanger? gas exchange via body surfaces in amphibians that is cheap and efficient 9 of 12 What is the uniform pool gas exchanger? Tidal air flow and fast movement of gasses in/out of lungs in humans/mammals. 10 of 12 What is the counter current gas exchanger? Flow of water opposite to the flow of blood in fish that allows gas exchange that is dependent on the rate of flow. 11 of 12 What is crosscurrent gas exchanger? Unidirectional flow of air through lungs in which there is a high diffusion gradient of the parralel lungs. 12 of 12
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