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Membrane Potential
The membrane potential is the difference in electrical charge between the intracellular and extracellular fluids across the neuronal membrane. This electrical difference serves as the energy source for the neural signal.
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Action Potential
Resting Potential
Membrane Potential
Threshold of Excitation
Long-term Potentiation (LTP)
Neuronal Communication as an Electrochemical Event
Pharmacological Intervention in Neural Pathways
Anion
Cation
Cell Membrane
Ion Channel Types
Membrane Potential
A neuron's membrane separates an internal fluid from an external fluid. If a large number of positively charged ions are suddenly allowed to move from the external fluid to the internal fluid, how would this movement affect the electrical charge inside the neuron relative to the outside?
A neuron's membrane separates an internal fluid from an external fluid. If a large number of positively charged ions are suddenly allowed to move from the external fluid to the internal fluid, how would this movement affect the electrical charge inside the neuron relative to the outside?
Membrane Potential
A neuron's outer surface is a barrier that allows some charged particles (ions) to pass through more easily than others. What is the most direct and significant consequence of this selective passage?
A neuron's outer boundary allows some substances to pass through while actively restricting the movement of others, particularly those with an electrical charge. What is the most direct and critical outcome of this selective filtering property for the neuron's electrical function?
Neuronal Membrane Fluid Separation
Ion Concentration in Neurons
Learn After
A neuron at rest exhibits a membrane potential, which is a difference in electrical charge between the inside and outside of the cell. Which statement best analyzes the underlying cause of this electrical difference?
A neuron at rest typically has a higher concentration of potassium ions (K+) inside and a higher concentration of sodium ions (Na+) outside. The interior of the neuron is negatively charged compared to the exterior. Considering these conditions, which statement best analyzes the forces that limit the net outflow of positively charged potassium ions, thereby helping to establish the stable resting electrical difference?