Document Detail


GAS TRANSPORT IN THE HAEMOLYMPH OF ARACHNIDS - CARBON DIOXIDE TRANSPORT AND ACID-BASE BALANCE
MedLine Citation:
PMID:  9317309     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The relationships between PCO2 and pH were determined in cell-free undiluted haemolymph of the arachnids Eurypelma californicum, Pandinus imperator and Cupiennius salei. The pH/bicarbonate diagrams and the CO2 equilibrium curves were calculated, using the Henderson­Hasselbalch equation, for haemolymph sampled at rest and during recovery from exercise. The calculations of solubility (alphaCO2) and dissociation constant (pK"') were based on additional ion concentration measurements. Blood gas analyses corroborate these results: after locomotor activity, there is a metabolic acidosis linked to the accumulation of lactate in the haemolymph. The concentration of bicarbonate in the haemolymph of resting individuals is quite different in the three species and is related to the extent of post-exercise bicarbonate depletion. During early recovery, buffering in the haemolymph strongly depends upon CO2 release. Potassium and magnesium concentrations in the haemolymph increase after exercise. During cold-acclimation (to 10 °C), there is a metabolic acidosis in the tarantula's haemolymph that is linked to the accumulation of acetate.
Authors:
Paul; Pfeffer-Seidl; Efinger; PÖRtner; Storz
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  188     ISSN:  1477-9145     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  1994 Mar 
Date Detail:
Created Date:  1997-10-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  47-63     Citation Subset:  -    
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