Processes contributing to metabolic depression in hepatopancreas cells from the snail Helix aspersa
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Processes contributing to metabolic depression in hepatopancreas cells from the snail Helix aspersa.
Cells isolated from the hepatopancreas of the land snail Helix aspersa strongly depress respiration both immediately in response to lowered P(O2) (oxygen conformation) and, in the longer term, during aestivation. These phenomena were analysed by dividing cellular respiration into non-mitochondrial and mitochondrial respiration using the mitochondrial poisons myxothiazol, antimycin and azide. No...
متن کاملThe modulatory effects of orexin B on the calcium channels activity in neuronal cells of Helix aspersa (garden snail)
Introduction: The functional effects of orexin-B on the calcium spikes and excitability of the neuronal soma membrane of garden snail, Helix aspersa were studied. Methods: Conventional intracellular recording, under the current clamp conditions was performed to examine the effects of orexin-B on the configuration and electrophysiological properties of calcium spikes. Results: Application o...
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Two experiments using garden snails (Helix aspersa) showed conditioned inhibition using both retardation and summation tests. Conditioned inhibition is a procedure by which a stimulus becomes a predictor of the absence of a relevant event--the unconditioned stimulus (US). Typically, conditioned inhibition consists of pairings between an initially neutral conditioned stimulus, CS(2), and an effe...
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Because oviposition in the land snail Helix aspersa is a metabolically expensive process coupled to a high fixed cost, one expects oviposition to occur only when the clutch size surpasses a minimum value at which the reproductive benefit exceeds the cost. We propose that neural innervation of the gonad allows H. aspersa to monitor oocyte production and ensure an adequate supply of gametes prior...
متن کاملThe evaporation of water from Helix aspersa. IV. Loss from the mantle of the inactive snail.
When a snail withdraws into its shell the only parts of the body left exposed to the air are a number of fleshy extensions of the mantle; the so-called mantle collar. This area of the body is a potentially serious source of water loss in the inactive terrestrial snail. The evaporation of water from active specimens of the common garden snail, Helix aspersa, is nearly identical to that from a fr...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2000
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.203.23.3603