Biology

HideShow resource information
View mindmap
  • Circulatory System
    • Cardiac Cycle
      • Myogenic Muscle
        • Contracts due to its own electrical excitation
      • Atrial Systole
        • Atria Contract
          • SAN
      • Diastole
        • All relaxed, blood flows straight to ventricles
      • Ventricular Systole
        • AVN
          • Purkyne Tissue
            • Apex of heart
              • Ventricles Contract
    • Blood Vessels
      • Arteries
      • Arterioles
      • Veins
      • Venules
      • Capillaries
    • Carriage of O2
      • Haemoglobin
        • Oxyhaemoglobin HbO8
          • A "haem" Fe2+ ion attracts O2 molecule, four per haemoglobin.
            • Due to O2 tension can associate and disassociate
              • As needed in respiring cells with low O2 tension
    • Carriage of CO2
      • CO2 diffuses from respiring tissues to red blood cell
        • 3CO2 + 2H2 = H2CO3
          • H2CO3 acid dissociates to H+ and HCO3-
            • Presence of H+ ions cause HbO8 = Hb + 4O2
              • H + Hb = HHb
              • Haemoglobinic acid formed to act as a buffer to stop pH in blood cell lowering.
            • Cl- ions diffuse into blood cells to neutralise H+ ions (Chloride Shift)

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »