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Science 5 March 1965:
Vol. 147. no. 3662, pp. 1140 - 1142
DOI: 10.1126/science.147.3662.1140
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Articles

I. Specific Nature of Triggering Events

Roger Eckert 1

1 Department of Zoology, Syracuse University, Syracuse, New York, and Marine Biological Laboratory, Woods Hole, Massachusetts

The flash of Noctiluca miliaris occurs only in response to a characteristic all-or-none action potential, the polarity of which is opposite to that of metazoan action potentials, whether recorded internally or externally. Mechanical stimulation evokes a slow, generator-like graded potential which can give rise to the flash-triggering action potential. The flash is all-or-none; it facilitates, summates, and exhibits fatigue, each independently of changes in the amplitude of the action potential.


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