XL THE SUMMARY OF PART IV 327 



When the change of the protoplasm protein is raised by in the 

 contraction and extension of the molecules, the oscillation comes out 

 as a rhythmic motion. In general, the movement of organisms may 

 be achieved by such a contraction and extension of protein molecules 

 even when it is not oscillating or moving rhythmically. 



Not only the motion but also all the life processes are presumably 

 given rise to by various changes of protoplasm protein. Since the 

 changes should be associated with the adsorption and elution of a varie- 

 ty of ions and perhaps also with the appearance and disappearance 

 of polar groups, life phenomena are always accompanied by electric 

 changes as for example action current. 



