The plasma membrane of a neuron is more permeable to K⁺ because A) of its positive electrical charge. B) there are more leak ion channels for K⁺ than Na⁺. C) protein molecules cannot exit through the plasma membrane. D) Ca²⁺ block Na⁺ and Cl⁻ channels. E) there are more leak ion channels for Na⁺ than K⁺.

Question

Quizplus · Accepted Answer

The plasma membrane of a neuron is more permeable to K+ (potassium ions) because there are more leak ion channels for K+ than for Na+ (sodium ions). This allows potassium ions to move more freely across the membrane compared to sodium ions.

The Plasma Membrane of a Neuron Is More Permeable to K+

The Plasma Membrane of a Neuron Is More Permeable to K⁺