 This pattern of depolarization should not be confused with the more common depolarization which involves the influx of Na+ into the cell while K+ channels stay closed.Endolymph composition resembles that of the intracellular fluid (more K+ and less Na+) more closely compared to its counterpart, perilymph which resembles the extracellular fluid (more Na+ and less K+ compared to intracellular matrix).This depolarization will open voltage gated calcium channels.