Plz .how does an insulator stop the flow of an electric current?
insulators do not allow electrons to move easily through them
insulators have a positive change,so they absorb electrons
insulators convert electric energy to other forms of energy
insulators have too many electrons.

Explanation:

Consider substances that can easily diffuse through the lipid bilayer of the cell membrane, such as the gases oxygen (O2) and carbon dioxide (CO2). These small, fat soluble gasses and other small lipid soluble molecules can dissolve in the membrane and enter or exit the cell following their concentration gradient.