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Fig. 2. Burst of action potentials and associated contractions in the myoepithelium
sheet. (A) Series of spontaneous action potentials from subumbrellar
myoepithelium evoked by a single stimulus, showing a successive increase in
both the amplitude and duration. The dotted line indicates 0 mV. (B) Trace of
strain gauge output, showing that the force of contractions of the
myoepithelium sheet became stronger as both amplitude and duration of the
action potentials increased. The external solution was ASW.
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