Template:Normoxia - state or rate

Aerobic and anaerobic from normoxia to anoxia: oxygen availability and metabolic state or rate

Oxygen availability: state

• Normoxic
• Hyperoxic
• Hypoxic - "Metabolic hypoxia is indicated as a reduced oxygen flux below the critical oxygen pressure and is either fully or partially anaerobic." [1]
• Microxic - "Microxic regulation .. effectively increases the slope of the flux-pressure relation in the microxic region." [1]

Metabolism: state or rate

• Aerobic - Whereas anaerobic metabolism may proceed in the absence or presence of oxygen (anoxic or oxic conditions), aerobic metabolism is restricted to oxic conditions.
• Anaerobic - "In zoophysiology, 'anaerobic' (without air) is rarely defined in terms of controlled measurements of the actual extent of anaerobic conditions. [1]
• Anoxic - "When strictly anoxic conditions are not achieved, anaerobic metabolism proceeds simultaneously with oxygen consumption." [2]

1. Gnaiger E (1991) Animal energetics at very low oxygen: Information from calorimetry and respirometry. In: Strategies for gas exchange and metabolism. Woakes R, Grieshaber M, Bridges CR (eds), Soc Exp Biol Seminar Series 44, Cambridge Univ Press, London:149-71. - »Bioblast link«
2. Gnaiger E, Staudigl I (1987) Aerobic metabolism and physiological responses of aquatic oligochaetes to environmental anoxia. Heat dissipation, oxygen consumption, feeding and defecation. Physiol Zool 60:659-77. - »Bioblast link«