ATP-sensitive potassium channel

A. The channel is a spanning protein with a receptor site for ATP located on an intracellular region of the protein.

B. When blood plasma levels of glucose are very low, the potassium conductance of the ATP-sensitive potassium channels in the plasma membranes of beta-islet cells will be very high.

C. In smooth muscle cells surrounding an arteriole serving a region of the body that has just recently had very high levels of cellular activity, the potassium conductance of the ATP-sensitive potassium channels in the plasma membranes of these smooth muscle cells will be very high.