Podcast
Questions and Answers
What is the term used to describe the voltage gradient at which equilibrium is reached for an ion?
What is the term used to describe the voltage gradient at which equilibrium is reached for an ion?
- Charge gradient
- Membrane potential
- Equilibrium voltage (correct)
- Ion potential
How does a membrane potential arise?
How does a membrane potential arise?
- Through the creation of concentration gradients
- By the equal distribution of ions on both sides of the membrane
- As a result of electrical charges on both sides of the membrane
- Due to the movement of ions across the membrane (correct)
Which ion moves faster across the membrane in the given scenario?
Which ion moves faster across the membrane in the given scenario?
- Cl- (correct)
- Ca2+
- Na+
- K+
What causes diffusion to begin across the membrane?
What causes diffusion to begin across the membrane?
Why does an electric potential emerge across the membrane according to the text?
Why does an electric potential emerge across the membrane according to the text?
What is the significance of having a difference in electrical charges on both sides of a membrane?
What is the significance of having a difference in electrical charges on both sides of a membrane?
What term is used to describe the feature of the action potential where it reacts with exactly the same standard height?
What term is used to describe the feature of the action potential where it reacts with exactly the same standard height?
Which type of ion channels are responsible for generating an action potential in excitable membranes?
Which type of ion channels are responsible for generating an action potential in excitable membranes?
What is the typical peak membrane potential during an action potential?
What is the typical peak membrane potential during an action potential?
What is the purpose of inactivation of voltage-activated Na+ channels during an action potential?
What is the purpose of inactivation of voltage-activated Na+ channels during an action potential?
What happens when delayed K+ rectifiers open during an action potential?
What happens when delayed K+ rectifiers open during an action potential?
How is the resting membrane potential near -70 mV maintained at rest?
How is the resting membrane potential near -70 mV maintained at rest?
What is the typical resting potential of animal cells?
What is the typical resting potential of animal cells?
Which of the following ions play special roles in the electrical phenomena occurring in neurons?
Which of the following ions play special roles in the electrical phenomena occurring in neurons?
What is the mechanism commonly called that maintains the difference in ion concentrations inside and outside the membrane?
What is the mechanism commonly called that maintains the difference in ion concentrations inside and outside the membrane?
What type of channels allow the passage of mostly inorganic ions through small hydrophilic pores?
What type of channels allow the passage of mostly inorganic ions through small hydrophilic pores?
What defines the resting membrane potential as per the text?
What defines the resting membrane potential as per the text?
In excitable cells like nerve and muscle, which channels are expressed to produce action potentials?
In excitable cells like nerve and muscle, which channels are expressed to produce action potentials?
