The electrical potential or voltage difference that exists between different points in living tissues, such as across cell membranes or in the nervous system.
From 'bio-' (life) + 'potential' (from Latin potentia, power/possibility). The term emerged in the 20th century as scientists discovered that electrical signals are fundamental to how living organisms function.
Your nervous system runs on biopotential—literally tiny electrical voltages jumping across nerve cells—and an EKG machine reading your heartbeat is just measuring the biopotentials created by your heart muscle contracting.
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