2025-02-19T12:55:57+03:00[Europe/Moscow] en true <p>Haemoglobin </p>, <p>Haemoglobin's affinity </p>, <p>Confromational shape </p>, <p>Place where oxygen for the foetus comes from </p>, <p>How is foetal haemoglobin adapted to load up easily with oxygen </p>, <p>Foetal Hb </p>, <p>Curve to the left </p>, <p>Curve to the right </p>, <p>Myoglobin </p> flashcards
BIOLOGY - OXYGEN DISSOCIATION CURVES

BIOLOGY - OXYGEN DISSOCIATION CURVES

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  • Haemoglobin

    1 haemoglobin can carry 4 oxygen molecules. Oxygen combines with haemoglobin to form oxyhaemoglobin

  • Haemoglobin's affinity

    If Hb combines easily with oxygen, we say that it has a high affinity for oxygen. Hb has a higher affinity where there is a higher concentration or partial pressure of oxygen

  • Confromational shape

    As each oxygen molecule binds to haemoglobin, it causes a shape change in the protein meaning that it is easier to bind the next oxygen molecule

  • Place where oxygen for the foetus comes from

    Foetus gains its oxygen from its mother's blood across the placenta

  • How is foetal haemoglobin adapted to load up easily with oxygen

    Foetal haemoglobin has a higher affinity for oxygen than adult haemoglobin, so a foetus can absorb oxygen from the mother's blood at all.

  • Foetal Hb

    Has a greater affinity for oxygen, its oxygen dissociation curve is shifted to the left of the mother's curve, mother's Hb releases oxygen and the foetal Hb combines with this oxygen.

  • Curve to the left

    Hb is better at loading oxygen

  • Curve to the right

    Hb is better at releasing oxygen

  • Myoglobin

    Pigment which binds to oxygen, only found in muscle cells and is an oxygen store with a high affinity for oxygen even at low partial pressures.