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Resting Membrane Potential: Video, Anatomy & Definition Quiz
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Resting Membrane Potential: Video, Anatomy & Definition Quiz

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Questions and Answers

What is the main topic of the video on resting membrane potential?

  • Action potentials in neurons
  • The function of mitochondria in cells
  • The structure of the cell membrane
  • The definition and significance of resting membrane potential (correct)

    • Which ion plays a critical role in establishing the resting membrane potential of a neuron?

  • Calcium (Ca2+)
  • Chloride (Cl-)
  • Potassium (K+) (correct)
  • Sodium (Na+)

    • What is the typical value for the resting membrane potential of a neuron?

  • $-100$ mV
  • $-70$ mV (correct)
  • $0$ mV
  • $+70$ mV

    • How does an increase in extracellular potassium concentration affect the resting membrane potential of a neuron?

    <p>It causes depolarization</p> Signup and view all the answers

    What is the significance of the sodium-potassium pump in maintaining the resting membrane potential?

    <p>It helps establish concentration gradients of sodium and potassium ions</p> Signup and view all the answers

    In terms of charge, what characterizes the interior of a neuron at rest?

    <p>Predominantly negative charge</p> Signup and view all the answers

    What is the main topic of the video on resting membrane potential?

    <p>Nerve cell membrane characteristics</p> Signup and view all the answers

    Which ion is primarily responsible for establishing the resting membrane potential?

    <p>Potassium (K+)</p> Signup and view all the answers

    What is the approximate value of the resting membrane potential in millivolts?

    <p>-90 mV</p> Signup and view all the answers

    How does depolarization of the cell membrane affect the resting membrane potential?

    <p>Decreases the positive charge inside the cell</p> Signup and view all the answers

    Which of the following is a characteristic of an excitable cell in relation to resting membrane potential?

    <p>Has a variable resting membrane potential</p> Signup and view all the answers

    Why is the concept of resting membrane potential important for understanding cellular physiology?

    <p>It influences cell signaling and communication</p> Signup and view all the answers

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