The process of generation of electrical energy from running water can be summarized as follows:
A dam is used to store running water. The dam acts as a reservoir for running water. Then the water is rushed over a turbine. The turbine converts the kinetic energy with which the water is moving into mechanical energy. When the turbine turns, then the generator attached to it also spins which convert the mechanical energy into electrical energy.
I believe it is formed by secretions from the oocyte and the follicle granulosa cells. The human oocytes consists of four types of zona pellucida glycoproteins ZP1, ZP2, ZP3, and ZP4 which have different roles in fertilization.