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Fig. 1. Temporal changes rate of in oxygen uptake (O2) in Boa constrictor before and after ingestion of a meal in untreated control animals (solid circles) and snakes treated with omeprazole to inhibit gastric acid secretion (open circles). The prey was ingested at time 0 h. Values are means ± 1 S.E.M. (N=5 in each group).