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Biology

What is the function of Potassium (K+) as an ion

Transmission of nerve impulses across neurones and to maintain osmotic anion/cation balance across cell membranes

What is the function of Potassium (K+) in a compound?

N/A

What is the function of Calcium (Ca2+) as an ion?

It is a constituent of bones, teeth (enamel) and shells, the clotting of blood and muscle contraction.

What is the function of Calcium (Ca2+) in a compound?

Calcium Pectate binds adjacent cell walls in plants to form the middle lamella.

What is the function of Magnesium (Mg2+) as an ion?

It activates many of the body's enzymes and is a component of bone and teeth.

What is the function of Magnesium (Mg2+) in a compound?

It is a constituent of chlorophyll (absorption of light energy).

What is the function of Iron (Fe2+) as and ion?

It is found in electron carriers - cytochromes used in respiration and photosynthesis.

What is the function of Iron (Fe2+) as a compound?

Constituent of haemoglobin, it forms in the haem group (transports oxygen in the blood).

What is the function of Hydrogen Carbonate (HCO3-) as an ion?

It behaves as a buffer in the blood.

What is the function of Hydrogen Carbonate (HCO3-) in a compound?

It is involved in the transport of CO2 in the blood.

What is the function of Nitrate (NO3-) as an ion?

It is a constituent of amino acids and proteins (e.g enzymes), nucleic acid (part of the nitrogenous base adenine) and chlorophyll.

What is the function of Phosphate (PO4 3-) as an ion?

Phosphate salts e.g Sodium and Potassium Phosphates act as buffers.

What is the function of Phosphate (PO4 3-) in a compound?

It is a constituent of cell membranes and phospholipids, ATP and is in the nucleotides of DNA and RNA.

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