Circulatory system- blood (Edexcel GCSE Biology): Quizzes
📚Quizzes
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13 questions from this quiz
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Practise the questions
13 questions from this quiz
What are the four main components of blood?
What are the four main components of blood?
Plasma, RBCs, WBCs, platelets
What colour is plasma?
What colour is plasma?
Straw-coloured
Approximately what proportion of blood volume does plasma make up?
Approximately what proportion of blood volume does plasma make up?
Just over half
Where does plasma transport carbon dioxide from and to?
Where does plasma transport carbon dioxide from and to?
From cells to lungs
Why are red blood cells biconcave in shape?
Why are red blood cells biconcave in shape?
Increases surface area for absorption
Why do red blood cells lack a nucleus?
Why do red blood cells lack a nucleus?
To carry more haemoglobin
What is formed when haemoglobin combines with oxygen in the lungs?
What is formed when haemoglobin combines with oxygen in the lungs?
Oxyhaemoglobin
What are the two main types of white blood cells?
What are the two main types of white blood cells?
Phagocytes and lymphocytes
How would you describe the structure of phagocytes?
How would you describe the structure of phagocytes?
Large cells with irregular shape
What is the process called when phagocytes engulf and destroy pathogens?
What is the process called when phagocytes engulf and destroy pathogens?
Phagocytosis
What do lymphocytes produce to help fight pathogens?
What do lymphocytes produce to help fight pathogens?
Antibodies
How do antibodies make it easier for phagocytes to destroy pathogens?
How do antibodies make it easier for phagocytes to destroy pathogens?
Coat pathogens, causing them to clump
What are platelets and where are they produced?
What are platelets and where are they produced?
Cell fragments from bone marrow