If you put erythrocytes in a hypertonic solution, such is the blood with abnormally high sodium, the concentration of the solutes will be greater outside the erythrocytes. This means that the water concentration of the erythrocites is higher than that of the blood. Since the aim is to balance water concentration on the inside and outside of the cell, the water will exit the erythrocytes. They will lose water and, consequently, will shrink in size.
Answer by Mimiwhatsup: A one step process where one atom of helium is generated from four atoms of hydrogen.
Why: "Hydrogen fusion (nuclear fusion of four protons to form a helium-4 nucleus) is the dominant process that generates energy in the cores of main-sequence stars. It is also called "hydrogen burning", which should not be confused with the chemical combustion of hydrogen in an oxidizing atmosphere." (Wikipedia)
