Facilitated diffusion

There are 4 boxes with images inside the boxes. The boxes are labeled from left to right 1, 2, 3, 4. All of the boxes show an image of a phospholipid bilayer with a membrane protein embedded in the phospholipid bilayer. The space above the bilayer on each image is labeled outside cell and there are 6 sodium ions and one potassium ion below label. The space below the bilayer on each image is labeled inside cell and there are 4 potassium ions and one sodium ion. Box one has a sodium ion on the inside of the cell with an arrow pointing into the open end of the membrane protein. Inside the membrane protein are two additional sodium ions, and the membrane protein is closed at the outside of the cell. Box two has an ATP attached to the closed portion of the membrane protein on the inside of the cell, and the membrane protein on the outside of the cell is open and has an arrow pointing from it towards 3 sodium ions that are in the outside of the cell. Box 3 has an open membrane protein on the outside of the cell and there is a potassium ion on the outside of the cell with an arrow pointing towards the membrane protein. There is a second potassium ion within the membrane protein. On the inside of the cell the membrane protein is closed and there is a single phosphate attached to the closed membrane protein and then an ADP molecule on the inside of the cell. Box 4 has a closed membrane protein on the outside of the cell and an open membrane protein on the inside of the cell. There is an arrow pointing from the membrane protein towards two potassium ions inside the cell and there is also a phosphate on the inside of the cell.