Maintaining Resting Potential: Ion Channels and Sodium-Potassium Pumps
18 Questions
2 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

Which part of a neuron is responsible for receiving information?

  • Axon
  • Terminal Buttons
  • Dendrites (correct)
  • Soma

    • In a neuron, what is the function of the Axon?

  • Integrate incoming signals
  • Pass information along to other neurons (correct)
  • Receive information
  • Pass information to the Soma

    • Which type of neuron has one axon and many dendrites emerging from the soma?

  • Unipolar neurons
  • Bipolar neurons
  • Sensory neurons
  • Multipolar neurons (correct)

    • What is the role of sensory neurons in the nervous system?

    <p>Carry information from sensory receptors toward the CNS</p> Signup and view all the answers

    Which component of a neuron carries information to the terminal buttons?

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

    What is the main process involved in brain development regarding connections between neurons?

    <p>Reduction of connections through neural pruning</p> Signup and view all the answers

    What is the main function of sodium-potassium pumps on the cell membrane?

    <p>Actively transporting Na+ ions out of the cell and K+ ions into the cell</p> Signup and view all the answers

    During resting potential, what ions are more concentrated inside the cell?

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

    What is the significance of stimulation arriving at the dendrites of a neuron?

    <p>Determines whether the neuron will fire or not</p> Signup and view all the answers

    Which type of transporter actively transports molecules across a membrane?

    <p>Sodium-potassium pumps</p> Signup and view all the answers

    What is the ratio of Na+ ions pumped out of the cell to K+ ions pumped into the cell by sodium-potassium pumps?

    <p>3 Na+ out for every 2 K+ in</p> Signup and view all the answers

    Which event occurs when many different neurons stimulate the dendrites of a neuron?

    <p>Decision on whether to fire or not based on excitatory or inhibitory signals</p> Signup and view all the answers

    What is the role of Nodes of Ranvier in the transmission of the action potential?

    <p>Speeding up the transmission of the action potential</p> Signup and view all the answers

    What initiates the opening of sodium ion channels in a neuron?

    <p>Excitatory input to the soma</p> Signup and view all the answers

    At what membrane potential does the sodium ions rush into the cell during an action potential?

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

    What is the immediate consequence of potassium ions exiting the cell during an action potential?

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

    What is the function of sodium-potassium pumps after an action potential is generated?

    <p>Maintaining resting membrane potential</p> Signup and view all the answers

    Which drug may interfere with the function of sodium channels and affect action potentials in neurons?

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

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser