Oxygen Sensing in Tissues by Gerhart Drews (auth.), Professor Dr. med. Helmut Acker PDF

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By Gerhart Drews (auth.), Professor Dr. med. Helmut Acker (eds.)

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Wegener within seconds when they are flooded with nitrogen. In the locust, the stage of total immotility is reached after a short period of hyperactivity, characterized by escape movements, increased ventilation, loss of body coordination, and anoxic convulsions (see Wegener et al. 1985, 1986; Wegener 1987 for review). Heart beat will rapidly cease and hemolymph flow is at a standstill in anoxic insects. 6 for the locust. Anaerobic products cannot be removed from the tissue during anoxia as insect organs are not capillarized (open circulatory system) and hemolymph does not circulate.

Ideally, the measurement in a flowthrough system is required in order to make sure that the lowest rate of metabolism at a given P0 2 is considered. For extrapolation to zero activity, anaerobic metabolism must be excluded as a source for energy during the different degrees of activity. Since only the influence of locomotory activity is considered by the extrapolation procedure, the calculated rate of oxygen consumption still includes the influence of ventilation. The methodological problems involved in the evaluation of SMR may be one reason why this analysis has not yet been done systematically for many species throughout the animal kingdom.

Eur J Biochem 143: 267-272 Saz HJ (1981) Energy metabolism of parasitic helminths: adaptations to parasitism. Annu Rev Physiol 43: 323-341 Scholander PF (1962) Physiological adaptation to diving in animals and man. Harvey Lect 57: 93-110 Schottler U (1986) Weitere Untersuchungen zum anaeroben Energiestoffwechsel des Polychaeten Arenicola marina L. Zool Beitr 30: 141-152 Schottler U, Wienhausen G (1981) The importance of the phosphoenol pyruvate carboxykinase in the anaerobic metabolism of two marine polychaetes.

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