Digitalis lactone and a triple-repeating sugar called a glycoside. Digitalis works by inhibiting sodium-potassium ATPase. This results in an increased intracellular concentration of sodium ions and thus a decreased concentration gradient across the cell membrane. This increase in intracellular sodium causes the Na/Ca exchanger to reverse potential, i.e., transition from pumping sodium into the cell in exchange for pumping calcium out of the cell, to pumping sodium out of the cell in exchange for pumping calcium into the cell. This leads to an increase in cytoplasmic calcium concentration, which improves cardiac contractility. Under normal physiological conditions, the cytoplasmic calcium used in
Plant-for-the-Planet President. In addition to the young people, one adult also serves on the board, in a position called the "Planet-for-the-Planet Secretariat". The goal of the Global Board is to give the organisation a focus and make organisation-wide decisions. Coordinated with the organisation, tree planting activities or "parties" are organised by students and children themselves. The students need to find foresters and environmental organisations to supply seedlings, and show them how, where, and when to plant. The funding needed to plant trees comes from individual and corporate donations. Plant-for-the-Planet promises to plant one tree for every Euro donated. The organisation also