Also known as John Wayne Airport, SNA is the only commercial service airport in Orange County, California. It is about 35 miles south of Los Angeles, between the cities of Costa Mesa, Irvine, and Newport Beach, and is 14 miles from Disneyland.
potassium channel a voltage-gated protein channel selective for the passage of potassium ions. protein channel a watery pathway through the interstices of a protein molecule by which ions and small molecules can cross a membrane into or out of a cell by diffusion.
â¢ The voltage-gated potassium channels respond slowly to depolarization. about the time that the action potential reaches its peak. â¢ You've seen that potassium moves out of the cell as voltage-gated potassium channels open. potassium moves out, depolarization ends, and the positive feedback loop is broken.