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In the context of the neural impulse, which of the following causes the depolarization of neuron membranes?
Multiple Choice
The inside of the neuron becomes negatively charged because of the excess of calcium ions.
Sodium gates open, and sodium ions flow into the neuron.
The outside of the neuron becomes positively charged because of the excess of chlorine ions.
О O
Potassium channels open, and potassium ions flow out of the neuron.

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anthougo

The main cause of the depolarization of neuron membranes is when the "Sodium gates open, and sodium ions flow into the neuron."

  • Depolarization of neuron membranes occur when Ach (acetylcholine receptors), which are responsive to nicotine and other drugs bind to the sodium gates.

  • The binding to the sodium gates allows the influx of ions, increasing the excitatory postsynaptic potential of the affected neuron membranes.

  • Depolarization of neuron membranes does not result from:
  1. inside because of negatively charged neuron from excess calcium ions.  
  2. outside because of positively charged neuron from excess chlorine ions.
  3. the opening of potassium channels and outflow of potassium ions from the neuron.

Thus, depolarization of neuron membrane always occur with the inflow of sodium ions into the neuron membrane with the opening of the sodium gates.

Learn more about the depolarization of neuron membrane at https://brainly.com/question/23843465

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