What happens to the neuron membrane during action potential?
Understand the Problem
The question is asking about the physiological changes that occur in a neuron's membrane during an action potential, specifically focusing on the permeability of ions and the change in membrane potential.
Answer
Neuron membrane depolarizes and repolarizes during action potential.
During an action potential, the neuron's membrane depolarizes as sodium ions influx, then repolarizes as potassium ions efflux. The process begins with the membrane depolarizing above the threshold voltage, followed by a rapid rise and fall in membrane potential.
Answer for screen readers
During an action potential, the neuron's membrane depolarizes as sodium ions influx, then repolarizes as potassium ions efflux. The process begins with the membrane depolarizing above the threshold voltage, followed by a rapid rise and fall in membrane potential.
More Information
Action potentials are crucial for neurotransmission; they propagate along axons via phases of depolarization, followed by repolarization. Membrane depolarization is primarily caused by sodium ions entering through channels, while repolarization is due to potassium ions exiting the neuron.
Tips
A common mistake is confusing depolarization with repolarization; remember, depolarization involves sodium and repolarization involves potassium.
Sources
- Neuron action potentials: The creation of a brain signal - khanacademy.org
- The Action Potential | Anatomy and Physiology I - Lumen - courses.lumenlearning.com
- Action potential - Wikipedia - en.wikipedia.org
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