Neuron Resting Potential and Gated Channels
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Questions and Answers

What is the role of the electrical gradient in nerve impulse transmission?

  • To push sodium ions out of the cell
  • To pull sodium ions into the cell (correct)
  • To maintain a constant concentration of potassium ions
  • To decrease the membrane potential

    • What type of gated channel opens in response to a neurotransmitter binding to its receptor?

  • Ligand gated channel (correct)
  • Mechanically gated channel
  • Graded potential channel
  • Voltage gated channel

    • What is the state of a neuron prior to the sending of a nerve impulse?

  • Threshold of excitement
  • Hyperpolarization
  • Depolarization
  • Resting potential (correct)

    • What is the result of a stimulation beyond the threshold of excitement?

    <p>Massive depolarization</p> Signup and view all the answers

    What is the term for the rapid depolarization of a neuron?

    <p>Action potential</p> Signup and view all the answers

    What type of gated channel opens in response to changes in membrane potential?

    <p>Voltage gated channel</p> Signup and view all the answers

    What happens immediately after an action potential in a neuron?

    <p>Sodium channels are quickly closed</p> Signup and view all the answers

    What is the role of the sodium-potassium pump in a neuron?

    <p>To maintain the resting potential</p> Signup and view all the answers

    What is the characteristic of an action potential in terms of its amplitude and velocity?

    <p>Independent of the intensity of the stimulus</p> Signup and view all the answers

    What is the function of the refractory period in a neuron?

    <p>To prevent signals from traveling in both directions down the axon at once</p> Signup and view all the answers

    What is the direction of potassium ions flow during the return of the neuron to its resting state?

    <p>Out of the neuron</p> Signup and view all the answers

    What is the term for the jumping of an action potential from one node to another in the process of nerve impulse transmission?

    <p>Saltatory Conduction</p> Signup and view all the answers

    What type of synapse is more abundant in the human nervous system?

    <p>Chemical Synapse</p> Signup and view all the answers

    What is the effect of Inhibitory Post-Synaptic Potentials (IPSPs) on the neuron?

    <p>Make an action potential less likely</p> Signup and view all the answers

    What occurs at the nodes of Ranvier during the transmission of a nerve impulse?

    <p>The action potential is regenerated</p> Signup and view all the answers

    What is the function of the synapse in the nervous system?

    <p>To allow chemical messages to cross from one neuron to another</p> Signup and view all the answers

    What is the period during which the membrane cannot produce an action potential?

    <p>Absolute Refractory Period</p> Signup and view all the answers

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