Defending against infection

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1. Which statement about immunity is correct?

  • Passive immunity involves receiving antibodies
  • Active immunity involves receiving antibodies
  • Passive immunity involves the body making its own antibodies
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2. It is important to use antibiotics carefully because:

  • antibiotics are very expensive
  • it reduces the spread of resistant strains
  • it reduces the spread of resistant strains

3. What is one of the functions of white blood cells?

  • White blood cells produce antigens that destroy pathogens
  • White blood cells ingest and destroy pathogens
  • White blood cells carry oxygen in the bloodstream

4. Which of these is one of the main problems with bacteria?

  • They produce toxins
  • They are killed by antibiotics
  • They cause measles and mumps in young children

5. What can vaccination involve?

  • Injecting a dead form of the disease to stimulate immunity
  • Injecting an inactive form of the pathogen to stimulate immunity
  • Injecting an inactive form of the disease to stimulate immunity

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