1. Briefly describe how K+ leak channels are able to selectively pass K+ ions, but reject Na+ ions with a nearly identical size and charge. Be sure to mention: (a) How the pore of the channel is formed and what enables specificity, (b) What interactions are critical in selectively passing K+ and why they cannot pass Na+.
2. Make up a short answer question that has the names of the four types of ATP pumps, and has a blank that asks for the function of each pump and another blank that asks for an example of where they would be located. Be sure to include your answers!