Inorganic Ions

Question 1

Cation Ca2+

Calcium ions

Answer 1

Necessary for nerve impulse transmission.
Muscle contraction
Acts as a cofactor for enzymes (blood clotting)

Question 2

Cation Na+

Sodium Ions

Answer 2

Necessary for nerve impulse transmission.
Kidney function

Question 3

Cation K+

Potassium ions

Answer 3

Necessary for nerve impulse transmission.
Stomatal opening

Question 4

cation H+

Hydrogen ions

Answer 4

Catalysis of reactions.
pH determination

Question 5

Cation NH4+

Ammonium ions

Answer 5

Production of nitrate ions by bacteria.
Absorbed from soil by plants.

Question 6

Anion NO3-

Nitrate ions

Answer 6

Absorbed from soil by plants as nitrogen supplied to plants for amino acid and protein formation.

Question 7

Anion HCO3-

Hydrogen carbonate ion

Answer 7

Acts as a buffer to maintain blood pH

Question 8

Anion OH-

Hydroxide ions

Answer 8

Catalysis of reactions
pH determination

Question 9

Anion Cl-

Chloride ions

Answer 9

Balances positive sodium ions and potassium ions in cells.

Question 10

Anion PO4 3-

Phosphate ions

Answer 10

Cell membrane formation
ATP and nucleic acid production
Bone formation