Inorganic Ions 5.0 / 5 based on 3 ratings ? BiologyBiological molecules, organic chemistry and biochemistryASOCR Created by: RachelCreated on: 04-04-16 11:01 2310457819 Across 1. NO3-. Absorbed by plants from soil. Important source of nitrogen. (7) 3. K+. Nerve impulses. Muscle contraction. Regulating fluid balance. Activates essential enzyme for photosynthesis in plants. (9) 5. Na+. Nerve impulses. Muscle contraction. Regulating fluid balance in body. (6) 7. Ca2+. Transmission of nerve impulses, release of insulin from pancreas. Cofactor for many enzymes. Bone formation. (7) 8. OH-. Affects the pH of substances. More OH- creates more Alkali. (9) 9. Ion with a negative charge. (5) Down 2. HCO3-. Acts as a buffer, maintains pH of blood. (8, 9) 3. PO43-. Photosynthesis and respiration reactions. Needed for synthesis of biological reactions eg nucleotides, phospholipids, calcium phosphate. (9) 4. NH4+. Absorbed by plants from soil, important source of nitrogen for e.g amino acids, nucleic acids. (8) 10. Cl-. Involved in Chloride shift that helps maintain pH of blood during gas exchange. Acts as a cofactor for enzyme amylase. Some nerve impulses. (8)
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