motor activity. This is a different type of the mechanism of the transduction of
chemical energy into the mechanical work than muscle contraction. The former
mechanism is as important as the motor-based mechanism, but in Hidetake Miyata’s
opinion, it not well described in previously published books. Since many more
examples of biological motions have been discovered, it is interesting to know
how diverse the physical principles governing those motions would be. Thus,
some examples are explained in this book, but there are many unresolved questions
in this theme, and the study of the physical principle of biological motions will
remain as an important issue.
Sendai, Japan
Kazuo Ohki
Hidetake Miyata
vi
Preface