The plasma membrane of a neuron is more permeable to potassium ions 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 cell membrane.
D)calcium ions 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 has more leak ion channels for potassium ions (K+) than for sodium ions (Na+), making it more permeable to K+. This is due to the fact that the leak channels for K+ are more numerous and remain open for longer periods of time compared to the channels for Na+.

The Plasma Membrane of a Neuron Is More Permeable to Potassium