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  1. sarasousou1996

    AS Biology P1 MCQs Preparation Thread

    does haemoglobin have a higher affinity for oxygen or carbon dioxide?
  2. sarasousou1996

    AS Biology P1 MCQs Preparation Thread

    thanxx :D although am not fully convinced ill just learn it like that :P
  3. sarasousou1996

    AS Biology P1 MCQs Preparation Thread

    how come? i read alot of websites and all said it increases efficiency because without moisture the gases cannot diffuse rapidly so decreasing efficiency and moisture was always one of the points for efficiency of gaseous exchange surfaces
  4. sarasousou1996

    AS Biology P1 MCQs Preparation Thread

    hey can someone help me with this questions from novmeber 2011 variant 1 Which does not increase the efficiency of gaseous exchange in the alveoli? A The blood capillaries and alveoli have a large total surface area. B The blood flow is slowed as it passes through the pulmonary capillaries. C...
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