Electrophysiology – MCQs

50 Score: 0 Attempted: 0/50 Subscribe
1. The resting membrane potential of a typical mammalian neuron is approximately:





2. The Nernst equation is used to calculate:





3. Which ion is primarily responsible for depolarization during an action potential?





4. Repolarization of the action potential is mainly due to:





5. The Goldman-Hodgkin-Katz equation accounts for:





6. Voltage-gated sodium channels are blocked by:





7. Which ion triggers neurotransmitter release at the synapse?





8. Patch-clamp technique is used to:





9. The refractory period ensures that:





10. Myelination increases conduction velocity by:





11. Nodes of Ranvier are rich in:





12. The synaptic delay is typically:





13. The Hodgkin-Huxley model describes:





14. Which current dominates during the plateau phase of cardiac action potential?





15. Which electrode technique measures extracellular potentials?





16. The QRS complex in ECG represents:





17. The P wave in ECG corresponds to:





18. The T wave in ECG represents:





19. The threshold potential in most neurons is around:





20. Inhibitory postsynaptic potentials (IPSPs) are often mediated by:





21. Excitatory neurotransmitters typically cause:





22. Electroencephalography (EEG) measures:





23. Electromyography (EMG) records:





24. Calcium-induced calcium release (CICR) is important in:





25. The conduction velocity of unmyelinated axons is typically:




27. The end-plate potential (EPP) is generated at:





28. The role of the sodium-potassium pump is to:





29. Which ion channel type is critical for pacemaker activity in the heart?





30. Long-term potentiation (LTP) requires activation of:





31. Which current is responsible for the afterhyperpolarization phase?





32. Voltage clamp technique allows:





33. Which toxin blocks voltage-gated K⁺ channels?





34. In the heart, Purkinje fibers are specialized for:





35. Action potentials are generated at the axon hillock because:





36. Local anesthetics block action potentials by:





37. The refractory period prevents:





38. The unit of conductance is:





39. Electrical synapses transmit signals via:





40. Chemical synapses differ from electrical synapses by:





41. Ionotropic receptors mediate:





42. Metabotropic receptors act via:





43. Electrooculography (EOG) records:





44. Electroretinography (ERG) measures:





45. Which current is responsible for neurotransmitter vesicle fusion?





46. Hyperpolarization occurs when:





47. Which current maintains the plateau in ventricular action potentials?





48. EPP at neuromuscular junction is caused by:





49. Electrocardiography (ECG) records:





50. The main role of electrophysiology in neuroscience is to: