Which of the following situations occurs in electrically excitable cells? A) When Na⁺ channels open, K⁺ channels close. B) The sodium-potassium pump moves Na⁺ into the cell. C) Depolarization causes voltage-gated Na⁺ channels to open. D) Ligand-gated Na⁺ channels are opened by high extracellular Ca²⁺ levels. E) Proteins tend to diffuse out of the cell.

Question

Quizplus · Accepted Answer

Depolarization triggers the opening of voltage-gated sodium (Na+) channels, allowing Na+ to enter the cell, which is a key event in the generation of action potentials in electrically excitable cells such as neurons and muscle cells.

Which of the Following Situations Occurs in Electrically Excitable Cells