Podcast
Questions and Answers
What is the primary cause of the membrane potential?
What is the primary cause of the membrane potential?
- Electrical charges within the cell
- Unequal distribution of ions across the cell membrane (correct)
- Chemical reactions occurring inside the cell
- Diffusion of ions through the cell membrane
Which of the following ions is primarily responsible for the development of the action potential?
Which of the following ions is primarily responsible for the development of the action potential?
- Calcium (Ca2+)
- Potassium (K+)
- Sodium (Na+) (correct)
- Chloride (Cl-)
What is the effect of amiodarone on the sodium channels during the action potential?
What is the effect of amiodarone on the sodium channels during the action potential?
- Amiodarone enhances the inactivation of the sodium channels (correct)
- Amiodarone activates the sodium channels, causing further depolarization
- Amiodarone has no effect on the sodium channels
- Amiodarone blocks the sodium channels, preventing further depolarization
What is the main effect of changes in ion concentrations on the membrane potential?
What is the main effect of changes in ion concentrations on the membrane potential?
Which of the following is a key step in the development of the action potential?
Which of the following is a key step in the development of the action potential?
What is the primary purpose of the membrane potential?
What is the primary purpose of the membrane potential?
What does the Nernst equation help determine?
What does the Nernst equation help determine?
In which refractory period does a second action potential become impossible even with a strong stimulus?
In which refractory period does a second action potential become impossible even with a strong stimulus?
Why can a stronger stimulus elicit a second action potential during the relative refractory period?
Why can a stronger stimulus elicit a second action potential during the relative refractory period?
What is the role of amiodarone in preventing recurrent ventricular tachycardia?
What is the role of amiodarone in preventing recurrent ventricular tachycardia?
How does amiodarone impact the membrane potential in the context of ventricular tachycardia treatment?
How does amiodarone impact the membrane potential in the context of ventricular tachycardia treatment?
Why is amiodarone specifically useful in treating ventricular tachycardia?
Why is amiodarone specifically useful in treating ventricular tachycardia?
What is the typical range of the resting membrane potential (RMP) across the membrane of excitable cells?
What is the typical range of the resting membrane potential (RMP) across the membrane of excitable cells?
Which principle explains the ionic distribution that contributes to the resting membrane potential?
Which principle explains the ionic distribution that contributes to the resting membrane potential?
Which ion plays a primary role in the origin of the resting membrane potential?
Which ion plays a primary role in the origin of the resting membrane potential?
What is the definition of an action potential?
What is the definition of an action potential?
Which types of channels play a dominant role in the generation of an action potential?
Which types of channels play a dominant role in the generation of an action potential?
What is the purpose of the Nernst equation in the context of membrane potentials?
What is the purpose of the Nernst equation in the context of membrane potentials?
Which of the following statements accurately describes the effect of amiodarone on sodium channels?
Which of the following statements accurately describes the effect of amiodarone on sodium channels?
What is the primary mechanism by which amiodarone reduces the risk of ventricular tachycardia?
What is the primary mechanism by which amiodarone reduces the risk of ventricular tachycardia?
Which of the following statements illustrates the clinical relevance of basic science knowledge?
Which of the following statements illustrates the clinical relevance of basic science knowledge?
Which of the following resources would provide the most relevant information about action potentials?
Which of the following resources would provide the most relevant information about action potentials?
What is the primary function of the absolute refractory period in cardiac muscle cells?
What is the primary function of the absolute refractory period in cardiac muscle cells?