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Questions and Answers
Which force is responsible for the equilibrium membrane potential of a nerve cell?
Which force is responsible for the equilibrium membrane potential of a nerve cell?
- Electrical force (correct)
- Gravity
- Friction
- Diffusion
Why does the resting potential of a nerve exist?
Why does the resting potential of a nerve exist?
- The membrane is impermeable to small ions
- The membrane is permeable to large negative proteins
- The membrane is impermeable to large negative proteins (correct)
- The membrane is permeable to small ions
What is the Nernst equation used for?
What is the Nernst equation used for?
- Calculating the concentration of ions outside a cell
- Calculating the equilibrium membrane potential of a nerve cell (correct)
- Calculating the rate of diffusion of ions
- Calculating the concentration of ions inside a cell
What does RT/F equal at room temperature (25°C, 298K)?
What does RT/F equal at room temperature (25°C, 298K)?
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Given the outside and inside concentrations of K+ ion as 20,400 g/l, what is the equilibrium membrane potential of K+?
Given the outside and inside concentrations of K+ ion as 20,400 g/l, what is the equilibrium membrane potential of K+?
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Which type of stimuli can initiate an action potential in a neuron?
Which type of stimuli can initiate an action potential in a neuron?
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What is the approximate change in membrane potential required to initiate an action potential?
What is the approximate change in membrane potential required to initiate an action potential?
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Which ion passes through the membrane, causing depolarization during an action potential?
Which ion passes through the membrane, causing depolarization during an action potential?
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What happens to the membrane potential during depolarization?
What happens to the membrane potential during depolarization?
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How long does the action potential typically last in most neurons and muscle cells?
How long does the action potential typically last in most neurons and muscle cells?
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