Neuron Resting Potential Quiz
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Questions and Answers

What is the purpose of sodium-potassium pumps in neurons?

To maintain the resting potential by exchanging Na+ and K+ ions

What is the approximate value of the resting membrane potential in a neuron?

-70 mV

What type of process is the maintenance of the resting potential in neurons?

An active process

How many Na+ ions are expelled for every 2 K+ ions admitted by the sodium-potassium pump?

<p>3 Na+ ions</p> Signup and view all the answers

What creates the charge difference across the membrane in neurons?

<p>Unequal distribution of ions</p> Signup and view all the answers

What is the role of ATP in the exchange of sodium and potassium ions?

<p>It is required for hydrolysis</p> Signup and view all the answers

Describe the role of sodium-potassium pumps in maintaining the resting potential of a neuron.

<p>Sodium-potassium pumps maintain the resting potential by actively exchanging sodium and potassium ions across the membrane.</p> Signup and view all the answers

Explain why the maintenance of the resting potential is considered an active process.

<p>The maintenance of the resting potential is considered active because it is ATP-dependent, requiring energy for the sodium-potassium pump to function.</p> Signup and view all the answers

How does the unequal distribution of ions across the membrane contribute to the creation of a membrane potential?

<p>The unequal distribution of ions leads to a charge difference, with more positively charged ions outside and more negatively charged ions inside, establishing the membrane potential.</p> Signup and view all the answers

Discuss the significance of the electrochemical gradient created by the sodium-potassium pump.

<p>The electrochemical gradient ensures that the cell interior is relatively negative compared to the extracellular environment, facilitating processes like signal transmission.</p> Signup and view all the answers

Why is it necessary for some K+ ions to leak back out of the cell after being admitted by the sodium-potassium pump?

<p>Some K+ ions leak back out to maintain the balance of ions and prevent an excessive buildup of positive charge inside the cell.</p> Signup and view all the answers

Explain the importance of the sodium-potassium pump in the context of neuron function.

<p>The sodium-potassium pump is crucial for establishing and maintaining the resting potential, which is essential for neuronal excitability and signal transmission.</p> Signup and view all the answers

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