The total area of a cell membrane in a single fat cell is 104 mm2, there is one insulin receptor per 1 mm2 of membrane, and 1 mm2 of cell membrane contains 106 phospholipid molecules.
1. How many insulin receptors are in a fat cell?
2. How many phospholipids molecules are in a fat cell?
3. How many phospholipid molecules are there for each insulin receptor?
4. What general principle of hormone action does your answer support?