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Objective: 3) Select the major function(s) performed in living organisms by the following elements:

calcium: bone, teeth, muscle contraction
phosphorus: ATP, protein, DNA
chlorine: NaCl (salt), water balance
sulfur: protein
potassium: nerve transmission, muscle contraction
sodium: NaCl, water balance, nerve transmission
magnesium: enzymes
iodine: thyroid function
iron: blood hemoglobin
oxygen: part of water (H2O)
carbon: forms structural framework of organic molecules