Photo by 7 SeTh (edited)
The cells is the dance halls. Outside are the streets.
Magnesium and potassium are lovers. They waltz with one another.
Sodium and calcium are lovers too. They salsa in the street.
Sodium and potassium are in a love-hate relationship; they tango wherever they meet.
Calcium and magnesium are rivals in dance battles throughout the hood.
More about the magnesium-potassium waltz