Give examples of the biological role of chemical elements.

Bio elements – oxygen, hydrogen, carbon, nitrogen, phosphorus and sulfur – are essential components of biological polymer molecules – proteins, polysaccharides and nucleic acids.
Sodium, potassium and chlorine ensure the permeability of cell membranes, the work of potassium – sodium (K / N-) pump, the conduct of a nerve impulse.
Calcium and phosphorus are structural components of the intercellular substance of bone tissue. In addition, calcium is one of the factors in blood coagulation.
Iron is a part of the erythrocyte protein – hemoglobin, and copper – is part of a similar protein, which is also an oxygen carrier, – hemocyanin (for example, in mollusk erythrocytes).
Magnesium is an essential part of chlorophyll plant cells. And mod and zinc are part of the thyroid and pancreas hormones, respectively.

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