1.8

Question 1

What are inorganic ions and where are they found in the body?

Answer 1

-Ions that do not contain carbon atoms
-Found in cytoplasm & extracellular fluid
-May be in high or very low concentrations

Question 2

Explain the role if hydrogen ions in the body

Answer 2

-High concentration of H+ = low (acidic) pH
- H+ ions interact with H-bonds & ionic bonds in tertiary structure of proteins which can cause them to denature

Question 3

Explain the role of iron ions in the body

Answer 3

• Fe2+ bonds to porphyrin ring to for haem group in haemoglobin
• Haem group has binding site to transport 1 molecule of O2 around body in bloodstream
  -4 harm groups per haemoglobin molecule

Question 4

Explain the role of sodium ions in the body

Answer 4

-Involved in co-transport for absorption of glucose & amino acids in lumen of gut
-Involved in propagation of action potentials in neurons

Question 5

Explain the role of phosphate ions in the body

Answer 5

component of:
-DNA
-ATP
-NADP
cAMP