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. 1976 Nov;16(11):1331–1335. doi: 10.1016/S0006-3495(76)85777-3

Effects of removing extracellular Ca2+ on excitation and adaptation in Limulus ventral photoreceptors.

J E Lisman
PMCID: PMC1334961  PMID: 974224

Abstract

In Limulus ventral photoreceptors, removing extracellular calcium (Ca2+o) increases the median latency of light-evoked discrete waves. Removal greatly lengthens the time-to-peak of responses in the dark-adapted cell, but not in the light-adapted cell. Removal does not block light-adaptation or the light-induced rise in intracellular calcium (Ca2+i). These results are interpreted in terms of the hypothesis that both sensitivity and the kinetics of excitation are dependent on Ca2+i, and that Ca2+i is dependent on Ca2+o in the dark-adapted cell, but in the light is dependent largely on Ca2+ released from intracellular compartments.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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