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topical membership is not evidence of a direct dietary effect.\nplain_language: Sodium entry through ENaC supports potassium secretion in this perfused segment.\norganism: Oryctolagus cuniculus\ntissue_or_cell_type: Cortical collecting duct\nexperimental_model: Benzamil pretreatment and flow increase\nlimitations: Other species/segments can show ENaC-independent components; no universal requirement claimed.\ncross_nutrient: Sodium transport through ENaC supports potassium secretion.\nevidence_location: Figure 7 and associated Results.\n[liu-2007-calcium-flow] Ca2+ dependence of flow-stimulated K secretion in the mammalian cortical collecting duct (2007). https://journals.physiology.org/doi/10.1152/ajprenal.00057.2007 DOI: 10.1152/ajprenal.00057.2007","model_system":"Benzamil pretreatment and flow increase","directness":"author_interpretation","verification_status":"source_derived_draft","notes":"Exact curation-document quotation, not publisher quotation. 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