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Worksheets2. Body defences
Total questions: 10
Worksheet time: 3mins
What is skin flora?
Microscopic plants growing on the skin surface
Dead skin cells on the surface
Community of micro-organisms on the skin surface
Pathogens on the skin surface
How do phagocytes defend the body against microbes?
Ingest bacteria
Produce antibodies
Produce antitoxins
Clot the blood
What is the role of skin flora?
Ingest pathogens
Produce antibodies
Prevent pathogens becoming established
Make the skin waterproof
Which component of the blood forms clots to seal a wound?
Plasma
Platelets
Red blood cells
White blood cells
What is an antigen?
A protein produced by a lymphocyte
A type of pathogen
A protein on a pathogen that stimulates an immune response
A protein produced by a phagocyte
What is the role of antibodies?
To trigger an immune response
To inactivate specific bacteria and viruses
To neutralise toxins
To ingest bacteria
Which blood cells are stimulated by the presence of antigens?
Red blood cells
White blood cells called phagocytes
White blood cells called lymphocytes
What process has occurred to cell X in the diagram?
Mitosis of the lymphocyte to produce clones
Meiosis of the lymphocyte to produce clones
Mitosis of the phagocyte to produce clones
Meiosis of the phagocyte to produce clones
What is the role of antitoxins?
To neutralise toxins produced by bacteria
To neutralise toxins produced by viruses
To inactivate bacteria by attaching to specific antigens
To inactivate bacteria by attaching to the toxin
Which of the antibodies in the picture will inactivate the measles pathogen?
A
B
C
D
