Action Potentials in Neurons
10 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the term used to describe a neuron with a negative membrane potential?

  • Equilibrated
  • Polarised (correct)
  • Depolarised
  • Hyperpolarised
  • Which ion occupies a higher proportion in the inner membrane of a neuron?

  • Calcium
  • Chloride
  • Potassium (correct)
  • Sodium
  • What type of ion channels open due to the physical stretching or deformation of the membrane?

  • Potassium-Gated Channels
  • Mechanically-Gated Channels (correct)
  • Ligand-Gated Channels
  • Voltage-Gated Channels
  • What does the sodium-potassium pump do to establish an electrochemical gradient across the cell membrane?

    <p>Pumps 3 potassium ions out for every 2 sodium ions pumped in</p> Signup and view all the answers

    What is a 'graded' potential that is not sufficient to propagate along the axon?

    <p>Small change in membrane potential</p> Signup and view all the answers

    What does the resting membrane potential of a neuron typically measure at?

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

    In what state is a neuron when it possesses a negative membrane potential?

    <p>Polarised</p> Signup and view all the answers

    At what membrane potential do voltage-gated sodium channels typically open, leading to a rapid influx of sodium ions?

    <p>-55mV</p> Signup and view all the answers

    During the peak phase of an action potential, what contributes to a further influx of sodium ions?

    <p>Opening of voltage-gated sodium channels</p> Signup and view all the answers

    What process helps balance the membrane potential by allowing potassium ions to exit the neuron?

    <p>Repolarization</p> Signup and view all the answers

    More Like This

    Neuron Action Potential Basics
    17 questions
    Use Quizgecko on...
    Browser
    Browser