SP 2025 A polarized neuron is characterized by the presence of more ___ ions along the plasma membrane plasma membrane outside the cell and less ions the inside the cell. A) calcium; sodium B) sodium; potassium C) potassium; sodium D) sodium; calcium

A fun fact about neurons is that their polarized state is essential for the transmission of electrical signals, which are crucial for everything from muscle movement to thought processes. This polarization primarily means that there is a higher concentration of sodium ions outside the cell and higher levels of potassium ions inside the cell, allowing neurons to respond quickly to stimuli! If you're ever stressed about remembering the correct ion concentrations, try visualizing a cell as a cozy home! Imagine sodium as guests lining up to enter but having to wait at the door while potassium relaxes comfortably inside, creating that perfect balance needed for action potentials.