elements and ions

Question 1

what do calcium ions do? Ca2+

Answer 1

• muscle contraction and nerve impulse transmission

Question 2

what do sodium ions do? Na+

Answer 2

• co-transport, reabsorption of water in the kidneys and nerve impulse transmission

Question 3

what do potassium ions do? (K+)

Answer 3

• stomatal opening and nerve impulse transmission

Question 4

what do hydrogen ions do? (H+)

Answer 4

• regulating ph, chemiosmosis and catalysis of reactions

Question 5

what do ammonium ions do? (NH4+)

Answer 5

• involved in the nitrogen cycle where bacteria convert ammonium ions into nitrate ions

Question 6

what do nitrate ions do? (NO3-)

Answer 6

• mineral ion absorbed by plants to provide a source of nitrogen to make amino acids

Question 7

what do hydrogencarbonate ions do? (HCO3-)

Answer 7

• maintain the pH of the blood

Question 8

what do chloride ions do? (Cl-)

Answer 8

• provide a negative charge to balance the positive sodium ion and potassium ions in cells

Question 9

what do phosphate ions do? (P043-)

Answer 9

• involved in the formation of phospholipids for cell membranes, nucleic acids and ATP formation and in making bones

Question 10

what do hydroxide ions do? (OH-)

Answer 10

• regulates pH