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The Journal of General Physiology, Vol 6, 711-721, Copyright © 1924 by The Rockefeller University Press

ARTICLE

THE LOCOMOTION OF LIMAX

I. TEMPERATURE COEFFICIENT OF PEDAL ACTIVITY.



W. J. Crozier 1 and G. F. Pilz 1

1 From the Zoological Laboratory, Rutgers College, New Brunswick.

Pedal progression of the slug Limax maximus was studied to obtain relations between wave velocity on the sole of the foot, wave frequency, the advance due to a single wave, and the velocity of vertically upward creeping. Each of the first three quantities is directly proportional to the simultaneous velocity of progression. Under comparable conditions, that is when work is done at a constant rate, the frequency of pedal waves is influenced by the temperature according to the equation of Arrhenius, with µ = 10,700 (Q10 for 11° to 21° = 2.1). The velocity of a single wave must have very nearly the same "temperature characteristic," which is found also in another case of nerve net transmission (in Renilla).

Submitted on May 22, 1924


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