The blood (AQA GCSE Biology): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are the four main components of blood?
What are the four main components of blood?
RBCs, WBCs, platelets, plasma
What percentage of blood is made up of plasma?
What percentage of blood is made up of plasma?
About 55%
Which waste product does plasma transport from the liver?
Which waste product does plasma transport from the liver?
Urea
Approximately what percentage of blood is red blood cells?
Approximately what percentage of blood is red blood cells?
About 45%
What is the function of haemoglobin in red blood cells?
What is the function of haemoglobin in red blood cells?
Picks up and carries oxygen
Why is the biconcave shape of red blood cells important?
Why is the biconcave shape of red blood cells important?
Larger surface area for oxygen pickup
Why do red blood cells lack a nucleus?
Why do red blood cells lack a nucleus?
More space inside for haemoglobin
How do white blood cells differ from red blood cells?
How do white blood cells differ from red blood cells?
WBCs are larger and have a nucleus
What do phagocytes do?
What do phagocytes do?
Surround and destroy bacteria & viruses
What do lymphocytes produce?
What do lymphocytes produce?
Antibodies
What are platelets?
What are platelets?
Tiny cell fragments with no nucleus
Under a microscope, which feature identifies white blood cells?
Under a microscope, which feature identifies white blood cells?
Larger with a dark area inside (nucleus)