8.4 Transport Of Oxygen And Carbon Dioxide In The Blood Flashcards

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1
Q

Haemoglobin

A

Large globular protein made of 4 peptide chains. Red pigment carrying oxygen.

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2
Q

Oxyhaemoglobin

A

Binding of oxygen and haemoglobin. Reversible reaction

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3
Q

Positive cooperativity

A

Arrangement of haemoglobin molecule allowing molecule to change shape as soon as one oxygen molecule binds to a haem group, making it easier for the next oxygen molecules to bind

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4
Q

Oxygen disassociation curve

A

Tool to help understand how blood carries and releases oxygen. Shows affinity of haemoglobin for oxygen

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5
Q

Bohr effect

A

As partial pressure of CO² rises, haemoglobin gives up oxygen more easily.

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6
Q

Partial pressure

A

Pressure exerted by a single component in a mixture of gases

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7
Q

Fetal haemoglobin

A

Higher affinity for oxygen than the adult haemoglobin in the mother. Removes oxygen from the maternal blood as they pass each other.

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8
Q

C0² transport methods

A

5% dissolved in plasma. 10-20% combined with amino groups in polypeptide chains of haemoglobin. 75-85% converted into hydrogen carbonate in erythrocyte cytoplasm

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9
Q

Carbonic anhydrase

A

Enzyme catalysing reversible reaction between C0² and water to form carbonic acid.

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