Mastering the Resting Membrane Potential
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Questions and Answers

Which of the following statements accurately describes the resting membrane potential of neurons?

  • The outside of the cell is negatively charged compared to the inside.
  • The outside of the cell is positively charged compared to the inside.
  • The inside of the cell is negatively charged compared to the outside. (correct)
  • The inside of the cell is positively charged compared to the outside.

    • What is the voltage reference point used to measure the membrane potential?

  • The absolute number of negative charges on either side of the membrane.
  • The excess charge on the inside of the cell.
  • The excess charge on the outside of the cell. (correct)
  • The magnitude of the potential difference across the membrane.

    • If the inside of a neuron has an excess of negative charge and the potential difference across the membrane is 70 mV, what is the membrane potential stated as?

  • 0 mV
  • Positive 70 mV
  • -70 mV (correct)
  • 70 mV

    • What do volts measure in relation to the membrane potential?

    <p>The difference in charge across a membrane.</p> Signup and view all the answers

    Does a membrane potential of -70 mV indicate the number of negative and positive charges on either side of the membrane?

    <p>No</p> Signup and view all the answers

    Which of the following accurately describes the resting membrane potential of neurons?

    <p>The inside of the cell is negatively charged with respect to the outside.</p> Signup and view all the answers

    What is the voltage reference point used to measure the membrane potential?

    <p>The extracellular fluid</p> Signup and view all the answers

    What does a membrane potential of -70 mV indicate?

    <p>The inside of the cell has an excess of negative charge.</p> Signup and view all the answers

    What do volts measure in relation to the membrane potential?

    <p>The difference in charge across the membrane.</p> Signup and view all the answers

    What is the magnitude of the resting membrane potential?

    <p>70 mV</p> Signup and view all the answers

    Study Notes

    Neuron Resting Membrane Potential

    • The resting membrane potential of neurons is typically around -70 mV.

    Measuring Membrane Potential

    • The voltage reference point used to measure the membrane potential is the outside of the cell.

    Interpreting Membrane Potential

    • A membrane potential of -70 mV indicates that the inside of the neuron has an excess of negative charge compared to the outside.
    • The magnitude of the resting membrane potential is around -70 mV.

    Understanding Volts

    • Volts measure the potential difference, or voltage, across the cell membrane.
    • A membrane potential of -70 mV does not directly indicate the number of negative and positive charges on either side of the membrane, but rather the difference in electrical potential between the inside and outside of the cell.

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    Description

    Test your knowledge on the resting membrane potential in neurons. Understand the concept of potential difference across plasma membranes and the polarity of the membrane.

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