The Action Potential in All Its Glory - A Review/Summary

Leslie Samuel explains the action potential process in neurons, starting with the resting membrane potential and the roles of sodium and potassium ions. He describes the phases of depolarization, repolarization, and hyperpolarization, and how the resting potential is restored. The video concludes with an invitation for further exploration of the topic.

What is the resting membrane potential of a neuron?

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Where does the action potential begin in a neuron?

• Axon terminals

• Axon hillock

• Dendrites

• Cell body

What happens during depolarization?

• Potassium ions leave the cell

• Sodium ions enter the cell

• The membrane potential becomes more negative

• The neuron returns to resting state

What is the equilibrium potential for sodium?

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During repolarization, which ions move out of the neuron?

• Calcium ions

• Potassium ions

• Chloride ions

• Sodium ions

What is the term for when the membrane potential becomes more negative than the resting potential?

• Depolarization

• Hyperpolarization

• Equilibrium

• Repolarization

Which mechanism helps restore the resting membrane potential?

• Sodium-potassium pump

• Chloride channels

• Voltage-gated sodium channels

• Calcium channels