absorbed from the soil by plants, important source of nitrogen, used to make amino acids and nucleic acids
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Card 7
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acts as a buffer, helps maintain the pH of the blood.
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Card 8
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involved in 'chloride shift', maintains blood pH during gas exchange, acts as cofactor for enzyme, amylase, also involved in nerve impulses.
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Card 9
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involved in photosyntheis and respiration reactions, needed for synthesis for many biological processes, such as nucleotides (ATP), phospholipids and calcium phosphate( strengthens bones)
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Card 10
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affects the pH of substances, more OH- than H+ makes it alkaline
