Action potential
Taxonomic distribution and evolutionary advantages
Columns: Animal | Cell type | Resting potential (mV) | AP increase (mV) | AP duration (ms) | Conduction speed (m/s)
Squid (Loligo) | Giant axon | −60 | 120 | 0.75 | 35 | Earthworm (Lumbricus) | Median giant fiber | −70 | 100 | 1.0 | 30 | Cockroach (Periplaneta) | Giant fiber | −70 | 80–104 | 0.4 | 10 | Frog (Rana) | Sciatic nerve axon | −60 to −80 | 110–130 | 1.0 | 7–30 | Cat (Felis) | Spinal motor neuron | −55 to −80 | 80–110 | 1–1.5 | 30–120