Which of the Following is an Electrical Event

Question

Which of the following is an electrical event?
A) "Lubb-dupp"
B) Actin and myosin interaction
C) Murmur
D) Depolarization

Accepted Answer

Depolarization is an electrical event that occurs when the electrical charge within a cell changes, often due to the influx or efflux of ions such as sodium or potassium. The other options (A, B, and C) are related to the mechanics of the heart or muscle contraction, but do not involve electrical events.