By J.W.L. Beament
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Additional resources for Advances in Insect Physiology, Vol. 4
Neuroptera . H. Hymenoptera . I. Diptera . J. Lepidoptera . N. Conclusions . References . . 33 34 36 . 41 42 43 . 4 0 . . 4 4 . . . . . . . 4 4 45 46 47 48 48 50 51 51 52 54 56 61 I. INTRODUCTION The occurrence of uric acid in the excreta of insects was established before the turn of the century and its presence has been confirmed subsequently by a large number of investigators (see reviews in Wigglesworth, 1950; Prosser, 1952; Roeder, 1953; Chauvin, 1956). Earlier findings were generalized in statements such as those of Needham (1935): “.
Usherwood and Dr. A. C. Neville for their comments on an early draft of this article. H. (1956). The effect of internal and external potassium concentration on the membrane potential of frog muscle. J. Physiol. 133, 631-658. Aidley, D. J. (1963). Influence of calcium ions on potassium contracture in an insect leg muscle. Nature, Lond. 198,591-592. J. (1965a). The effect of calcium ions on potassium contracture in a locust leg muscle. J. Physiol. 177, 94-102. J. (1965b). The effects of strontium and other divalent cations on potassium contracture in a locust leg muscle.
E. the size of the response is dependent upon the size of the stimulus). , 1959). , 1953). In this case the stimulus for the production of the electrically excited response is the postsynaptic potential, and the point at which the T H E E X C I T A T I O N OF I N S E C T S K E L E T A L MUSCLES 21 electrically excited response arises from the postsynaptic potential is given by the point of inflection on the rising phase of the response (Fig. 2). Here, again, the electrically excited component is a graded response, being proportional in size to the depolarization produced by the postsynaptic potential, as is evident in Fig.
Advances in Insect Physiology, Vol. 4 by J.W.L. Beament