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Which event predominantly dictates the depolarization phase of an action potential in neurons?

A. Opening of sodium channels
B. Opening of potassium channels
C. Closing of calcium channels
D. Closing of chloride channels

Sagot :

GinnyAnswer

Final answer:

Voltage-gated sodium channels are crucial for the depolarization phase in neuron action potentials.


Explanation:

Voltage-gated sodium channels predominantly dictate the depolarization phase of an action potential in neurons. When the cell's membrane potential reaches threshold, these channels open, allowing sodium ions to rush into the cell, leading to depolarization.

As depolarization spreads and reaches threshold, the action potential moves down the axon in a unidirectional manner. Sodium channels go into a refractory state, ensuring the wave of depolarization travels one way.

The depolarization phase of an action potential is a rapid process where voltage-gated sodium channels play a crucial role in initiating and propagating the action potential along the neuron.


Learn more about Depolarization phase of action potential in neurons here:

https://brainly.com/question/32251012


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