Fig. 5. Membrane currents of L- and T-responses of nematocytes. (Aa, Ba) Two L-responses of the same nematocyte (voltage-clamped near the resting potential) induced by deflections of the same cnidocil apparatus of a distant nematocyte with a time interval of 0.6 s. The L-response in B was associated with cyst discharge of the stimulated cell. T-events occurred superimposed on the L-responses. Lower traces: probe excursions (the small second excursions did not reach the cnidocil). (Ab, Bb) Higher time resolution of the initial phases of the responses. Note the earlier and steeper start of the L-response in B. (C) Membrane currents of T-events recorded when the membrane voltage was clamped at –70 mV. (D) T-currents at various clamped membrane voltages; voltages indicated next to the traces. Arrowheads indicate steps of outward current at reversed membrane voltages. Note sign reversal of the current at clamped –10 mV. (E) Amplitudes of T-currents as a function of clamped membrane voltage. Filled circles indicate the second outward current component of two-phase events. The straight line indicates a linear fit to the data. All records from Stauridiosarsia.