8 K> 18 



Receptor Potential (mV) 



Fig. 22 (C) 



10 IS 



Potencial. millivoitt 



20 



Fig. 22 (D) 



Fig. 22. (A) — (C) Impulse frequency plotted as a function of receptor 

 potential amplitude. (A) An insect mechanosensory sensillum.^"' (B) A 

 muscle spindle of the frog." (C) A crayfish abdominal stretch receptor 

 neuron (plotted from data given in Terzuolo and Washizu."' In (D) 

 impulse frequency is plotted against the amplitude of the generator 

 potential recorded from an eccentric cell in the lateral eye of Limulus. 

 (A from Wolbarsht,"3 pig. 2; B from Katz," Fig. 2B; D from 

 MacNichol,'* Fig. 8.) 



