{"id": "card_mind_the_neuron", "kind": "reference", "title": "The neuron — the membrane potential", "body": "A nerve impulse is a wave of voltage across a membrane, set by ion gradients through the Nernst equation (61.5 mV per decade at body temperature, sealed). The resting potential and every action potential are electrochemistry in a living cell. Rests on physical chemistry and biology.", "source": {"label": "Narrow Highway — the mind", "url": "", "authority_tier": "engine_derived"}, "shelf": "codex", "box": "the_mind", "bands": ["the mind", "pillar", "the_neuron", "one map"], "subject": "The neuron — the membrane potential", "connections": [{"to_card_id": "card_floor_the_mind", "relationship": "part_of", "evidence": "a pillar of the mind (The neuron)"}, {"to_card_id": "card_floor_physical_chemistry", "relationship": "connects_at", "evidence": "the membrane potential is a Nernst voltage - electrochemistry"}, {"to_card_id": "card_floor_biology", "relationship": "connects_at", "evidence": "the neuron is a living cell"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.the.mind", "facets": {"subject": ["one map", "pillar", "the mind", "the_neuron"]}, "presentation": {"glyph": "•", "kind_label": "the mind", "by": "Narrow Highway — the mind", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_floor_the_mind", "title": "The mind — matter aware of itself", "relationship": "part of", "why": "a pillar of the mind (The neuron)", "href": "/card/card_floor_the_mind", "resolved": true}, {"id": "card_floor_physical_chemistry", "title": "Physical chemistry — rate, equilibrium, acid-base, redox", "relationship": "connects at", "why": "the membrane potential is a Nernst voltage - electrochemistry", "href": "/card/card_floor_physical_chemistry", "resolved": true}, {"id": "card_floor_biology", "title": "Biology — life is self-replicating chemistry", "relationship": "connects at", "why": "the neuron is a living cell", "href": "/card/card_floor_biology", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_mind_the_neuron", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_mind_the_neuron"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}