Inorganic ions

Question 1

Inorganic ions

Answer 1

found in organisms where they occur in solution in the cytoplasm of cells and in body fluids

Question 2

ion

Answer 2

a charged particle

Question 3

Calcium ions

Answer 3

Ca 2+
* Calcium phosphate is and important structural component of teeth and bones
* Calcium ions are important in the transmission of nervous impulses + in the contraction of mucles

Question 4

Sodium

Answer 4

Na +
* Involved in the transmission of nervous impulses
* used in the kidney to reabsorb water and produce concentrated urine

Question 5

Potassium

Answer 5

K
* Involved in the nervous transmission
* Contribute to turgdity in guard cells which control stomata opening

Question 6

Magnesium

Answer 6

Mg 2+
* Chlorophyll contains magnesium
* Some enzymes that catalyse the breakdown of ATO have these ions in their active site

Question 7

Chloride

Answer 7

Cl
* used in the kidney to produced concentrated urine
* help to balance the positive charge of sodium and potassium ions in cells

Question 8

Nitrate ions

Answer 8

Plants use the nitrogen in these ions to make proteins

Question 9

Phosphate ions

Answer 9

• used for making nucleotides with calcium
• makes calcium phosphate that gives bones their strength
• used as a buffer in blood
• role in muscle contraction and nerve impulses
• component of many coenzymes
• role in transfer and storage in ATP

Question 10

Hydrogen ions

Answer 10

H+
* chemical reactions in living organisms involves exchanges of H ions
* changes in acidity can affect both structural and chemical reactivity so cells must constantly maintain an acid-base balance