Disease Prevention (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the role of keratin in the skin's defence against pathogens?
What is the role of keratin in the skin's defence against pathogens?
Forms tough fibrous barrier
What molecules give mucus its sticky properties for trapping pathogens?
What molecules give mucus its sticky properties for trapping pathogens?
Glycoproteins with carbohydrate chains
Where in the body is lysozyme secreted to break down bacterial cell walls?
Where in the body is lysozyme secreted to break down bacterial cell walls?
Blood, sweat, tears, and milk
What percentage of white blood cells are neutrophils?
What percentage of white blood cells are neutrophils?
60-70%
In blood clotting, what does thrombin convert fibrinogen into?
In blood clotting, what does thrombin convert fibrinogen into?
Fibrin
What effect does histamine have on blood vessels during inflammation?
What effect does histamine have on blood vessels during inflammation?
Causes vasodilation & permeability rise
Where do T lymphocytes mature before entering the lymphatic system?
Where do T lymphocytes mature before entering the lymphatic system?
Thymus gland
How many polypeptides form the simplest antibody structure (IgG)?
How many polypeptides form the simplest antibody structure (IgG)?
Four
How long does the primary immune response take for antibodies to appear in blood?
How long does the primary immune response take for antibodies to appear in blood?
10-17 days
Which type of immunity provides long-term protection with memory cell formation?
Which type of immunity provides long-term protection with memory cell formation?
Active immunity