Metabolic Consequences of Hypdxic Conditioning in Lymnaea Stagnalis
The ventilatory behavior of Lymnaea stagnalis (surfacing and opening the respiratory orifice, the pneumostome) can be operantly conditioned1. Snails placed in severely hypoxic water (< 1 ml 02 .L-1; created by gassing with nitrogen) are normally driven to increase their rate of ventilatory behavior1. However, if a noxious tactile stimulus is applied to the pneumostome at the time of ventilation, the animals can be conditioned not to breathe. They learn to self-impose hypoxia, and they remember to do so whenever they are placed in the nitrogen-gassed water. How is Lymnaea able to do so; most animals typically exhibit a hypoxic response designed to rectify oxygen limitation?
KeywordsLive Mass Hypoxic Response Conditioned Group Hypoxic Water Hypoxic Ventilatory Response
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