https://www.khanacademy.org/science/health-and-medicine/circulatory-system/heart-depolarization/v/membrane-potentials-part-1 2020-07-15T21:03:20Z Membrane potentials - part 1 Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy. Rishi Desai video https://cdn.kastatic.org/googleusercontent/KopZD3gLEmmxKoRvqyomdqHia7vWZ9YqbDwrUfLeXt8IrREfE9xYwFGoyvNEcqIAA5Rmzk963WPPkBP4yoRMzSN5 Membrane potentials - part 1 Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy. https://cdn.kastatic.org/ka-youtube-converted/PtKAeihnbv0.mp4/PtKAeihnbv0.mp4 502 Bioelectricity and electroreception in animals https://www.khanacademy.org/science/grade-12-biology-snc-aligned/xa8ba3a087f1f5288:nervous-system/xa8ba3a087f1f5288:synaptic-transmission-and-neurotransmitters/a/signal-propagation-the-movement-of-signals-between-neurons 2022-07-06T17:01:38.201596468Z Signal propagation: The movement of signals between neurons article https://www.khanacademy.org/science/health-and-medicine/circulatory-system/heart-depolarization/v/membrane-potentials-part-2 2023-08-14T21:12:46.061619254Z Membrane potentials - part 2 Continue to explore how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy. Rishi Desai video https://cdn.kastatic.org/googleusercontent/yUieDKdMIYCjzIUTQc4TdzgXP0_dIXHfQ9SzBem0UtlxPv5se2uKkblPVHdMcBgUvJb6MM3lebLgyNNA3CQtSiU7 Membrane potentials - part 2 Continue to explore how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentration gradient. Rishi is a pediatric infectious disease physician and works at Khan Academy. https://cdn.kastatic.org/ka-youtube-converted/eROhIFBGKuU.mp4/eROhIFBGKuU.mp4 525 Bioelectricity and electroreception in animals https://www.khanacademy.org/science/grade-12-physics-snc-aligned/xe5ce5527f6f71ade:electric-potential-and-capacitor/xe5ce5527f6f71ade:bioelectricity-and-electroreception-in-animals/e/axons--physics-and-chemistry-at-work-in-the-body 2025-12-12T15:40:39.541271471Z Physics of nerve cells: Electrochemistry and circuit components of axons Questions pertaining to action potentials and myelin sheaths Rabee Haq exercise https://www.khanacademy.org/science/health-and-medicine/nervous-system-and-sensory-infor/neuron-membrane-potentials-topic/v/neuron-action-potential-description 2023-08-17T23:33:36.770424498Z Neuron action potential description Neuron action potentials play a crucial role in transmitting information over long distances. The all-or-none property of action potentials and the speed-enhancing function of myelin sheaths are key aspects of this process. The distinction between graded potentials and action potentials is also vital, each contributing uniquely to neural signaling. Matthew Barry Jensen video https://cdn.kastatic.org/googleusercontent/NUVfNWWZQFT3Li311BSV-eO_FEjDUc5tzy6kM8W7AMyd8LOZOEiZcUIpapH57s5UAws_mKXmBkaFSy2DqXcS5zM Neuron action potential description Neuron action potentials play a crucial role in transmitting information over long distances. The all-or-none property of action potentials and the speed-enhancing function of myelin sheaths are key aspects of this process. The distinction between graded potentials and action potentials is also vital, each contributing uniquely to neural signaling. https://cdn.kastatic.org/ka-youtube-converted/h2H6POZowiU.mp4/h2H6POZowiU.mp4 414 Bioelectricity and electroreception in animals https://www.khanacademy.org/science/grade-12-physics-snc-aligned/xe5ce5527f6f71ade:electric-potential-and-capacitor/xe5ce5527f6f71ade:bioelectricity-and-electroreception-in-animals/a/neuron-action-potentials-the-creation-of-a-brain-signal 2025-04-14T22:34:53.782134477Z Neuron action potentials: The creation of a brain signal article