Mineral substances in cells are present in the form of ions and solid insoluble salts. What is the biological

Mineral substances in cells are present in the form of ions and solid insoluble salts. What is the biological significance of ions and insoluble salts?

1) insoluble salts are represented mainly by phosphates and carbonates, which are part of shells, teeth, bones, etc.;
2) ions give the internal environment of the cell or organism a certain pH (acid-base reaction), activate the synthesis and work of enzymes, create the transmembrane potential of the cell, provide the conduction of a nerve impulse, stimulate growth, etc.