3.1 Biological Elements - IONS

Question 1

Calcium (Ca2+)

Answer 1

Nerve impulse transmission
Muscle contraction

Question 2

Sodium (Na+)

Answer 2

Nerve impulse transmission
Kidney function

Question 3

Potassium (K+)

Answer 3

Nerve impulse transmission
Stomatal opening

Question 4

Hydrogen (H+)

Answer 4

Catalysis of reactions
pH determination

Question 5

Ammonium (NH4+)

Answer 5

Production of nitrate ions by bacteria

Question 6

Nitrate (NO3-)

Answer 6

Nitrogen supply for amino acid and protein formation

Question 7

Hydrogen carbonate (HCO3-)

Answer 7

Maintenance of blood pH

Question 8

Chloride (Cl-)

Answer 8

Balancing positive charge of sodium and potassium ions in cells

Question 9

Phosphate (PO43-)

Answer 9

Cell membrane formation
Nucleic acid and ATP formation
Bone formation

Question 10

Hydroxide (OH-)

Answer 10

Catalysis of reactions
pH determination