Biology
- Created by: Laura Tincks
- Created on: 08-11-12 19:58
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- Circulatory System
- Cardiac Cycle
- Myogenic Muscle
- Contracts due to its own electrical excitation
- Atrial Systole
- Atria Contract
- SAN
- Atria Contract
- Diastole
- All relaxed, blood flows straight to ventricles
- Ventricular Systole
- AVN
- Purkyne Tissue
- Apex of heart
- Ventricles Contract
- Apex of heart
- Purkyne Tissue
- AVN
- Myogenic Muscle
- 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
- Due to O2 tension can associate and disassociate
- A "haem" Fe2+ ion attracts O2 molecule, four per haemoglobin.
- Oxyhaemoglobin HbO8
- Haemoglobin
- 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)
- Presence of H+ ions cause HbO8 = Hb + 4O2
- H2CO3 acid dissociates to H+ and HCO3-
- 3CO2 + 2H2 = H2CO3
- CO2 diffuses from respiring tissues to red blood cell
- Cardiac Cycle
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