GCSE - Gcse Science - Biology - Natural Defences (Aqa) Solution

Q.1.

Which of the following statements about white blood cells is ?

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They engulf and ingest pathogens
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They expel the pathogens from the bloodstream via the liver
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They produce antibodies which neutralise pathogens
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They produce antitoxins to neutralise the effects of the toxins from pathogens

Q.2.

Your body can develop a natural immunity to certain pathogens. What is the name of the cells responsible for this?

Q.3.

What is produced by a lymphocyte that enables it to neutralise pathogens?

Q.4.

Which of the following also help your body defend itself against infection?

Q.5.

Which of the following is one of the ways that white blood cells provide active immunity?

Q.6.

Which of the following are the two main groups of white blood cells?

Q.7.

The lymphocytes produce antibodies. How do antibodies work?

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They penetrate inside the pathogen and destroy its nucleus
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They penetrate inside the pathogen and change the chemical composition of the cytoplasm
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They attach to the pathogens and cause them to clump together making it easy for phagocytes to find and ingest them
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They attach to the pathogens and take them to the liver where they are destroyed