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Fig. 2. (A) Effect of PR (1 µmol l-1, 90 s) on membrane potential
(mV) and input resistance (uncalibrated, downward deflections, upper trace),
and on tetani and contracture (lower trace). The resting membrane potential
before PR was -68 mV. During the contracture there was a period of 2 min
during which the OOM showed oscillations in membrane potential and force. (B)
Effect of F2 (1 µmol l-1, 90 s) on membrane potential
(mV) and input resistance (uncalibrated, downward deflections, upper trace),
and on tetani and contracture (lower trace). The resting membrane potential
before F2 was -80 mV. During the contracture there were spontaneous
contractions and fluctuations in membrane potential.