This photograph can be used to infer some examples of sphere interactions: The biosphere (humans) constructed a dam out of rock materials (geosphere). The lake's water (hydrosphere) seeps through the cliff walls behind the dam, either being groundwater (geosphere) or evaporating into the atmosphere (atmosphere).
Sodium, potassium, chloride and calcium ions are important for establishing the resting potential of the cell. The sodium-potassium gradient is maintained by a pump which transports 2 potassium inside the cell and 3 sodium ions outside the cell.
