And if we look on the microscopic level, we see that as the temperature is raised, the kinetic energy of the lipids and other molecules increases. And as a result, the intermolecular non covalent bonds holding the lipids can no longer maintain a packed and well ordered, well defined structure. And so as a result of the collapse of this rigid structure, the well defined structure, we basically create a more fluid and less ordered structure. So we go from the rigid state to that fluid state. So let's suppose we have two membranes, one membrane. In one membrane, we have strong intermodal interactions.