Hyperbaric Physiology - Extreme Physiology 0.0 / 5 ? Sports ScienceExtreme PhysiologyUniversityNone Created by: anniecritchlowCreated on: 01-06-19 12:26 What type of diving is it when you swim underwater on one breath? Free diving 1 of 41 1 ATA = 760mmHg 2 of 41 Each 10m descended adds what pressure? 1 ATA 3 of 41 Who's law says that as pressure increases, volume decreases? Boyles 4 of 41 What is not an airspace in the body that is affected by increasing pressure? Tendons 5 of 41 The pressure and volume of 1l of air at 30m is what? 4 ATA and 0.25l 6 of 41 The valsalva manoeuvre can be used to do what? Equalise ear pressure to prevent rupture of eardrum 7 of 41 Are eyes in danger when diving? Yes - air pressure changes in mask 8 of 41 A lung volume of 2l on the surface will be what at 120m? 0.15l 9 of 41 As depth increases, volume of lungs... Decreases 10 of 41 What mechanism shifts blood to resist lung collapse? Blood shift mechanism 11 of 41 What law says that the total pressure of a mixture of gases is equal to the sum of pressures which each gas would exert if on their own? Daltons 12 of 41 What is PO2 at sea level? 160mmHg 13 of 41 As depth increases, what happens to PO2? Increases 14 of 41 When ascending, what is not a reason why the diver has to be careful? Blood shifts back from lungs to other places in the body 15 of 41 What is the most common manifestation of the mammalian diving reflex? Bradycardia 16 of 41 What is the most important factor that affects maximum breath hold time? High CO2 17 of 41 Air is compressed to what in a SCUBA tank? 200 ATA 18 of 41 12l at 200 ATA is equivalent to what at 1 ATA? 2400l 19 of 41 What law states that the greater the pressure, the more gas will dissolve into liquid? Henry 20 of 41 When ascending... Gas will come out of blood 21 of 41 What is it when nitrogen dissolves into blood at deep depths and has unwanted effects on the nervous system? Nitrogen narcosis 22 of 41 What is not an effect of nitrogen narcosis? Nervousness 23 of 41 Air embolisms occur when? During ascent 24 of 41 The expansion of air when a diver descends causes what unwanted danger? Air embolism 25 of 41 What gets stretched during air embolisms? Alveolar membranes 26 of 41 How can the micro bubbles from the stretched alveoli cause damage? Lodging in brains or vital organs 27 of 41 What unwanted problem can arise from nitrogen coming out of the blood and tissues too quickly? Decompression sickness 28 of 41 Decompression sickness is more likely when? Ascending rapidly 29 of 41 Having a greater proportion of fat or muscle tissue creates a greater risk of decompression sickness? Fat tissue 30 of 41 When do symptoms of decompression sickness usually appear? 5 hours after 31 of 41 Can decompression sickness result in death/paralysis? Yes 32 of 41 Partial reduction of what substance can cause chemical destruction of cells? Oxygen 33 of 41 What is the biochemical basis of oxygen toxicity? Free radicals 34 of 41 Inspiring a gas with a PO2 of more that what increases chance of oxygen toxicity? 2 ATA 35 of 41 Divers should not breathe in pure oxygen at depths more than what? 7m 36 of 41 What gas can be used to reduce risk of oxygen toxicity and nitrogen narcosis? Helium 37 of 41 Using helium has what effect on breathing resistance? Decreases 38 of 41 In saturation diving, divers live in steel chambers pressurised to what? The depth at which they are working 39 of 41 In saturation diving, nitrogen in the air is replaced by what? Helium 40 of 41 How is the pressure in the chamber brought back to normal? Slowly 41 of 41
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