Podcast
Questions and Answers
What is the main purpose of the action potential in a neuron?
What is the main purpose of the action potential in a neuron?
- Producing contraction in muscle cells
- Balancing ion leakage and ion pumping
- Producing the nerve impulse (correct)
- Creating a negative electric polarization
What is the typical resting potential of a polarized neuron or muscle cell?
What is the typical resting potential of a polarized neuron or muscle cell?
- -50 mV
- +75 mV
- -100 mV
- -75 mV (correct)
What describes the steady state of a cell's membrane potential?
What describes the steady state of a cell's membrane potential?
- Action potential generation
- Depolarization
- Ion leakage imbalance
- Resting membrane potential (correct)
What is the primary factor that drives sodium ions into the cell during depolarization?
What is the primary factor that drives sodium ions into the cell during depolarization?
What initiates the generation of an action potential in a cell?
What initiates the generation of an action potential in a cell?
How does depolarization affect the membrane potential?
How does depolarization affect the membrane potential?
What is the membrane potential when sodium channels open completely?
What is the membrane potential when sodium channels open completely?
What happens to the membrane potential when other voltage-gated channels specific for potassium ion start opening?
What happens to the membrane potential when other voltage-gated channels specific for potassium ion start opening?
What occurs when potassium ions leave the cell during repolarization?
What occurs when potassium ions leave the cell during repolarization?
What happens when potassium ions reach equilibrium during hyperpolarization?
What happens when potassium ions reach equilibrium during hyperpolarization?
What is the significance of the short overshoot in membrane potential during hyperpolarization?
What is the significance of the short overshoot in membrane potential during hyperpolarization?
Which ion is responsible for repolarization of the membrane potential?
Which ion is responsible for repolarization of the membrane potential?
