Organisation: The Cardiovascular & Respiratory System (OCR GCSE Biology A (Gateway Science Suite)): 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?
Plasma, red cells, white cells, platelets
Which substance is NOT carried by plasma?
Which substance is NOT carried by plasma?
Haemoglobin
What is the main function of red blood cells?
What is the main function of red blood cells?
Carry oxygen from lungs to body cells
Why do red blood cells have a bioconcave disc shape?
Why do red blood cells have a bioconcave disc shape?
Provides a large surface area
Why do red blood cells have no nucleus?
Why do red blood cells have no nucleus?
Allows more room to carry oxygen
What is oxyhaemoglobin?
What is oxyhaemoglobin?
Haemoglobin bound to oxygen
What is the role of white blood cells?
What is the role of white blood cells?
Defence against pathogens
Which blood component contains a nucleus?
Which blood component contains a nucleus?
White blood cells
What do antibodies do?
What do antibodies do?
Clump pathogens together
What do some white blood cells do to pathogens?
What do some white blood cells do to pathogens?
Engulf and digest them
What is the main function of platelets?
What is the main function of platelets?
Help blood clot at wound sites
What happens without platelets?
What happens without platelets?
Excessive bleeding and bruising