Modification of frescon action in Lymnaea stagnalis smooth and cross-striated muscles by agents that alter potential-dependent or receptor-operated calcium permeability |
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| Authors: | DR Gardner BL Brezden |
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| Institution: | Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada |
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| Abstract: | The calcium entry blockers sodium nitroprusside (10?2M) and sodium pentobarbital (5 × 10?3M) had different effects on high-potassium-induced and Frescon-induced contractures in a smooth and a cross-striated muscle of the snail Lymnaea stagnalis. This suggests that Frescon causes an increase in sarcolemmal calcium permeability by a mechanism which is different from that utilized by high extracellular potassium. |
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