Figure 2. Effect of mitochondrial antagonists on the excitability of mechanically skinned cane toad muscle fibres.

A, representative force responses from one preparation equilibrated in standard K-HDTA solutions with and without mitochondrial antagonists. Summary of twitch data (B) (n = 6–7) and of force responses when replacing the K-HDTA solution with a Na-HDTA solution (C) (n = 7, 5 and 2 for azide, oligomycin and FCCP, respectively).