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. 1969 May;202(1):211–221. doi: 10.1113/jphysiol.1969.sp008805

Chloride fluxes in crab muscle fibres

C D Richards
PMCID: PMC1351475  PMID: 5770889

Abstract

1. Isotopic techniques were used to study the efflux of Cl- from single cannulated muscle fibres of the crab Maia squinado.

2. The efflux of 36Cl- was found to be exponential with steady rate constants ranging from 0·01 to 0·07 min-1. The steady efflux was ca. 1000-2000 pM cm-2 sec-1. The efflux was slightly depressed by K+-free saline and was unaffected by 40 mM-K+ saline and NO3- saline. The influx and efflux of Cl- were presumed independent.

3. The membrane conductance calculated from 36Cl- flux data was consistent with that determined by the method of electrotonic spread for other marine crustacean muscle fibres. Cl- accounted for most of the membrane conductance.

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Selected References

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