Inorganic Ions

Question 1

where are inorganic ions found in the body?

Answer 1

in solution in cytoplasm and body fluid, some in high concentrations and others in very low concentrations

Question 2

describe the role of hydrogen ions (H+)

Answer 2

-maintain pH levels in the body → high concentration = acidic / low pH
-affects enzyme rate of reaction as can cause enzymes to denature

Question 3

describe the role of iron ions
(Fe2+)

Answer 3

-component of haem group of haemoglobin
-allowing oxygen to bind / associate for transport as oxyhaemoglobin

Question 4

describe the role of sodium
ions (Na+)

Answer 4

1. involved in co-transport of glucose / amino acids into cells
2. involved in action potentials in neurons
3. affects water potential of cells / osmosis (topic

Question 5

describe the role of phosphate ions (PO4 3-)

Answer 5

1. component of nucleotides, allowing phosphodiester bonds to form in DNA / RNA
2. component of ATP, allowing energy release
3. phosphorylates other compounds making them more reactive
4. hydrophilic part of phospholipids, allowing a bilayer to form