g Virtually all vertebrate cells, whether excitable or not, have a resting membrane potential (RMP). A-1. Relative to the extra cellular fluid (ECF), the [K ] inside neurons should normally be (higher) (lower) (about the same) (can't predict). A-2. Nerve cells (neurons) should have a significant number of (a) ungated K channels that are always open (b) ungated Na channels that are always open (c) voltage gated Na channels (d) voltage gated K channels.