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  • Title: [The role of glucose in facilitating defensive reactions during feeding in the edible snail Helix lucorum].
    Author: Shevëlkin AV, Shumova EA.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 1993; 43(3):577-84. PubMed ID: 8362564.
    Abstract:
    The glucose role in a regulation of defense responses during feeding behaviour was studied in the snail Helix lucorum. It was found that 15-20 min after the beginning of the food intake the foot withdrawal response evoked by a train of electrical pulses was facilitated up to 20-30%. At the same time glucose concentration in the haemolymph increased from 0.5 +/- 0.1 mM in the starved molluscs to 0.9 +/- 0.5 mM in the snails at 20-25 min of eating. In the food satiated snails and 30-90 min after the food intake the glucose level in the haemolymph was 1.6 +/- 0.5 mM. It was shown that 0.5 ml glucose solution (5 mM) injected into the mantle cavity also facilitated the foot withdrawal defense response in the fastened snail, whereas injection of 2.5 mM or 10 mM glucose solutions were ineffective. These data support a supposition that glucose in one of the endogenous factors involved in regulation of defense behaviour during feeding in snails.
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