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10 Cards in this Set

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  • Back
What is Plasma and how much of the blood does it make up.
Plasma is the liquid part of the blood. It makes up 55% of the blood volume.
What is the general name given to the non-liquid part of blood (Other than plasma)? What does it consist of? How much of the blood does it make up?
Formed elements. Consists of cells and cell fragments. Makes up 45% of the blood volume.
What are the 3 formed elements found suspended in plasma?
Red blood cells (erythrocytes), white blood cells (leucocytes) and platelets (thrombocytes)
Where in the blood is oxygen carried?
3% plasma
97% haemoglobin (found in red blood cells)
What is the purpose of haemoglobin?
Combine with oxygen to form oxyhaemoglobin. This is used to transport oxygen from an area of high concentration in the body (i.e. lungs) to an area of low concentration, where it will break down into haemoglobin and oxygen. This usually occurs in the capillaries between body cells.
What is the formula for production of haemoglobin
Hb + O2 <-----> HbO2
What are the main substances transported within the blood
Nutrients i.e. glucose
Wastes i.e. urea
hormones i.e. testosterone, oestrogen
Ions i.e. Calcium (Ca2+), potassium (K+) and sodium (Na+)
What is oxygenated and de-oxygenated blood.
Oxygenated blood is blood with a high proportion of oxyhaemoglobin. Oxygenated blood is usually bright red in colour. De-oxygenated blood is blood with a high proportion of haemoglobin. De-oxygenated blood usually appears dark red or purple due to that being the colour of haemoglobin.
What are the three reasons red blood cells are well suited to their function of oxygen transport?
• contain haemoglobin, which is able to combine with oxygen
• have no nucleus so that there is more room for haemoglobin molecules
• are shaped like biconcave discs - the biconcave centre increases the surface area
Where in the blood is carbon dioxide carried?
7-8% dissolved in plasma
22% haemoglobin (carbaminohaemoglobin)
70% carried in plasma as bicarbonate ions, HCO3-