منابع مشابه
Phototropic Circus Movements of Limax As
The forms of the quanitative relationship between temperature and the responses of animals to light might be expected to differ according to the aspect of reaction which is measured as index of excitation. Thus in the clam Mya (Hecht, 1919-20, a) the primary photic excitation process for siphon retraction has a very low temperature coefficient such as is characteristic of photochemical changes,...
متن کاملSuppression of Phototropic Circus Movements of Limax by Strychnine
By injection with strychnine the phototropic circus movements of the slug Limax maximus may be suppressed, its phototropism abolished. The creeping activity of the foot is not in any essential way interferred with. Strychnine produces in Limax central nervous effects of the sort associated with its characteristic action. Hence, although an effect of the drug upon photoreceptors cannot be defini...
متن کاملPhototropic Circus Movements of Limax as Affected by Temperature
1. The theory of animal phototropism requires for particular instances a knowledge of the action of light as exerted through each of two bilaterally located receptors functioning singly. The measurement of "circus movements" which this involves must be concerned with such aspects of the reaction as are demonstrably dependent upon the effect of light. 2. The negatively phototropic slug Limax max...
متن کاملOnset of electrical excitability during a period of circus plasma membrane movements in differentiating Xenopus neurons.
Living neurons are usually first identifiable in primary cultures at the time of neurite initiation, and studies of excitability have been restricted largely to the subsequent period. A morphological early marker is described that identifies neurons for whole-cell voltage-clamp recordings before neurite initiation. Video time-lapse recordings of cultured cells dissociated from neurectoderm of X...
متن کاملSlotted-Circus : A Generic UTP framework for discretely-timed Circus
3 Slotted-Circus (Formal Definition) 10 3.1 Observational Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Required Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2.1 Accepted and Refused Events and Equivalent Traces . . . . . . . . . . . . . 11 3.2.2 Null Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1923
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.9.1.30