Blood Physiology
Red cells, white cells, platelets, clotting and blood groups. Unhurried, with explanations throughout.
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What is the approximate blood volume of an adult?
- About 1 litre
- About 500 mL
- About 5 litres
- About 10 litres
What percentage of blood is plasma?
- About 90%
- About 25%
- About 55%
- About 10%
What is a typical haematocrit (packed cell volume) in an adult man?
- About 45%
- About 15%
- About 5%
- About 70%
How long does a red blood cell normally survive?
- About 1 year
- About 120 days
- About 7 days
- About 24 hours
Where are red blood cells made in adults?
- In the liver
- In the kidneys
- In the red bone marrow
- In the spleen
Which hormone stimulates red blood cell production?
- Insulin
- Erythropoietin
- Glucagon
- Thyroxine
What is the normal haemoglobin concentration in an adult man?
- About 1 to 2 g/dL
- About 20 to 25 g/dL
- About 5 to 7 g/dL
- About 13 to 17 g/dL
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