1.2 Nitrogen Narcosis and Oxygen Toxicity
Cards (26)
- What gases are divers exposed to when breathing air?
- What is the effect of nitrogen at sea-level pressure?
- At what depth do the first symptoms of mild nitrogen narcosis appear?
- What symptoms does a diver exhibit at 120 feet?
- What happens to a diver at 150 to 200 feet?
- What occurs to a diver's strength at 200 to 250 feet?
- What is the effect of nitrogen narcosis beyond 250 feet?
- Why is nitrogen narcosis often compared to alcohol intoxication?
- How does nitrogen cause narcosis?
- What happens when PO2 in the blood rises above 100 mm Hg?
- What is the total O2 content in blood at 3000 mm Hg PO2?
- How much O2 is bound with hemoglobin at 3000 mm Hg?
- What is the PO2 when blood leaves the tissue capillaries after O2 use?
- What happens to the hemoglobin-O2 buffer mechanism at high PO2 levels?
- What can occur when breathing O2 at 4 atmospheres pressure?
- What are some symptoms of acute O2 poisoning?
- How does exercise affect susceptibility to O2 toxicity?
- What must molecular O2 be converted into to oxidize other compounds?
- What are oxygen free radicals?
- What happens to free radicals at normal tissue PO2 levels?
- What occurs above a critical alveolar PO2?
- What is one principal effect of oxidizing free radicals?
- Why are nervous tissues especially susceptible to oxygen toxicity?
- How long can a person be exposed to 1 atmosphere pressure of O2?
- What develops after about 12 hours of 1 atmosphere O2 exposure?
- Why does O2 cause damage in the lungs but not in other tissues?