Neuronal Excitability and Ion Channel Kinetics Quiz
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Questions and Answers

What is excitability in the context of neurons?

  • The speed at which a neuron transmits signals to other neurons
  • The resistance of a neuron to firing action potentials
  • The ease at which a neuron responds with action potentials to a stimulus (correct)
  • The ability of a neuron to store electrical charge

When can the Na+ channel conduct Na+ current?

  • When both the activation and inactivation gates are open
  • When both the activation and inactivation gates are closed
  • When the activation gates are open and the inactivation gate is not closed (correct)
  • When the activation gates are closed and the inactivation gate is open

What happens with depolarization in relation to the m-gate open probability?

  • The open probability of the m-gate increases (correct)
  • The open probability of the m-gate decreases
  • The m-gate closes
  • The m-gate remains unaffected

What is the effect of a bigger depolarization step on the m-gate open probability?

<p>The m-gate open probability increases quicker (D)</p> Signup and view all the answers

What is the role of channel kinetics in understanding neuronal excitability?

<p>To understand the way the ion channel gates are dependent on membrane voltage and time (C)</p> Signup and view all the answers

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