GEOTROPIC ORIENTATION IN ARTHROPODS
نویسندگان
چکیده
منابع مشابه
Geotropic Orientation in Arthropods
The creeping of the beetle Tetraopes tetraopthalmus during negatively geotropic orientation shows the angles of orientation (theta) on a surface inclined at alpha degrees to the horizontal to be proportional to sin alpha. The direction of orientation easily suffers temporary reversal to positive as result of handling. Mechanical stability during upward progression should be just possible when K...
متن کاملGeotropic Orientation of Young Mice
The geotropic orientation of young mice, on a plane at angles between 20 degrees and 50 degrees to the horizontal, obeys the equations previously found for young rats by Crozier and Pincus (1926-27). When the individuals tested in such experiments are not of the utmost uniformity, the variability of the measured orientations is increased.
متن کاملGeotropic Orientation of Young Rats
The geotropic orientation of Rattus rattus (roof rat) obeys the equations previously found applicable for Rattus norvegicus. The former is more sensitive, geotiopically, and the numerical values of the constants in the equations for the two forms are found to differ significantly. Certain consequences of this difference are pointed out.
متن کاملGeotropic Orientation of Young Mice
The upward geotropic orientation of young rats can be described by simple mathematical expressions (Crozier and Pincus, 1926, 192627, a, b; Pincus, 1926-27). In essence these formulae also apply precisely for the geotropism of invertebrates (Wolf, 1926-27; Crozier and Stier, 1927-28; Wolf and Crozier, 1927-28). I t seemed important to repeat with young mice the initial experiments with rats (Cr...
متن کاملOn the Geotropic Orientation of Young Mammals
Constants in equations of curves describing the geotropic orientation of young rats are repeatedly obtainable from litters of successive generations of the same inbred strains. Different inbred strains have been obtained for which the respective constants are quite unlike. Such findings show how necessary it is to employ biologically uniform material in experiments of this kind. And at the same...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1928
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.11.6.803