Electrocytes show few, if any, spontaneous MEPPs, and intracellular MEPPs are very small (Kriebel et al., 1987).
Viability studies of electrocytes in dissected organs were carried out with R.
If allowance is made for the lower cellular density in skate and the larger volume of individual electrocytes (as indicated by LDH activity), then the terminal volume of skate electric organ is between 10% and 18% of that found in Torpedo.
The action of collagenase on skate electric organ has two distinct, but partially overlapping, phases: first, the dissociation of innervated electrocytes; and second, the denervation of individual electrocytes and the concomitant release of nerve terminals into the surrounding fluid (Fox et al., 1990).
The morphology of electrocytes after treatment of organs for 4 days at 6 [degrees] C is shown in Figures 4 and 5.
When salines from washed electrocytes are examined with Nomarski optics, free nerve terminals can be identified [ILLUSTRATION FOR FIGURE 6 OMITTED].
In view of the greatly extended periods of exposure to collagenase used in the present study, it was important to establish the basic electrophysiological properties of electrocytes so treated.