Neuron Resting Potential Explanation
10 Questions
4 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 happens when a cell receives a strong enough stimulation from another cell?

  • The cell membrane increases the permeability to allow water molecules to enter.
  • The cell membrane opens special gates for sodium ions to rush into the cell. (correct)
  • The cell membrane releases potassium ions to balance the electrical charge.
  • The cell membrane closes the gates to prevent any ions from entering.

    • What is the result of sodium ions rushing into the cell during an action potential?

  • The outside of the cell becomes positively charged.
  • The inside of the cell becomes negatively charged.
  • The inside of the cell becomes positively charged. (correct)
  • The outside of the cell becomes neutral.

    • What initiates the electrical charge reversal in a neuron during an action potential?

  • Potassium ions entering the cell.
  • Sodium ions leaving the cell.
  • Dendrites activating the cell membrane gates. (correct)
  • Chloride ions increasing in concentration within the cell.

    • How does the electrical charge reversal move along the axon after initiation?

    <p>It moves down the axon in a chain reaction fashion.</p> Signup and view all the answers

    What is one characteristic of an action potential sequence based on the information provided?

    <p>The fastest neurons can propagate at 270 miles per hour.</p> Signup and view all the answers

    What is the primary reason the inside of a neuron is negatively charged when at rest?

    <p>Inability of negatively charged ions to exit the cell</p> Signup and view all the answers

    Why do sodium ions cluster around the outside of a neuron's membrane during the resting potential?

    <p>Attraction between the positively charged sodium ions and the negative charge inside the cell</p> Signup and view all the answers

    During resting potential, why are sodium ions unable to enter the neuron through its membrane?

    <p>The openings in the membrane are too small for sodium ions to pass through</p> Signup and view all the answers

    What is the role of electrical potential in the resting state of a neuron?

    <p>Creating a difference in charges that keeps some ions outside and some inside</p> Signup and view all the answers

    Why does the resting neuron have a negative charge inside compared to outside?

    <p>Charged particles inside are bigger and cannot exit through permeable membrane</p> Signup and view all the answers

    Study Notes

    Neuron Stimulation and Action Potential

    • A cell receives strong stimulation, leading to depolarization and the generation of an action potential.
    • Sodium ions (Na+) rush into the cell during an action potential, causing depolarization and reversing the neuron's electrical charge.
    • The initial electrical charge reversal in a neuron during an action potential is triggered by the opening of voltage-gated sodium channels.

    Propagation of Action Potential

    • The electrical charge reversal, once initiated, travels along the axon as a wave of depolarization.
    • This propagation occurs through the sequential opening of sodium channels along the axon, creating a domino effect.

    Characteristics of Action Potential

    • An action potential has an all-or-nothing characteristic, meaning it either occurs fully or not at all, without partial responses.

    Resting Potential of Neurons

    • The inside of a neuron is negatively charged at rest due to the presence of large anions and a lower concentration of sodium ions compared to the outside.
    • Sodium ions cluster around the outside of a neuron's membrane during resting potential due to the higher concentration outside and the membrane's selective permeability.

    Sodium Ion Entry During Resting Potential

    • Sodium ions cannot enter the neuron through its membrane during resting potential because the voltage-gated sodium channels remain closed, maintaining the negative interior charge.

    Role of Electrical Potential

    • Electrical potential in the resting state of a neuron is crucial for maintaining the resting membrane potential and ensures the neuron can respond to subsequent stimuli.

    Resting Neuron Charge Comparison

    • The resting neuron has a negative charge inside compared to the outside primarily because of the unequal distribution of ions, particularly the high concentration of potassium ions (K+) inside and sodium ions outside.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Learn about the electrical charge of a neuron at rest and the distribution of charged ions inside and outside the cell. Understand the concept of resting potential and the permeability of the cell membrane.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser