The membranes of neurons at rest are very permeable to but only slightly permeable to hints the membranes of neurons at rest are very permeable to but only slightly permeable to na+; cl– k+; na+ k+; cl– na+; k+

The membranes of neurons at rest are very permeable to K+ but only slightly permeable to Na+. The sodium – potassium pump carry both Na and K ion through the membrane to balance the leakage. Na+ is pushed out of the cell and K+ is pulled into the cell.