Q.1
Which of the following statements about white blood cells is ?
  • They engulf and ingest pathogens
  • They expel the pathogens from the bloodstream via the liver
  • They produce antibodies which neutralise pathogens
  • 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?
  • Lymphocytes
  • Leucocytes
  • Phagocytes
  • Virocytes
Q.3
What is produced by a lymphocyte that enables it to neutralise pathogens?
  • Antigens
  • Antipaths
  • Antibodies
  • Antibacts
Q.4
Which of the following also help your body defend itself against infection?
  • Mucus and cilia in the respiratory system
  • Hydrochloric acid in the stomach
  • Lysozyme (an enzyme) in tears
  • All three of the above
Q.5
Which of the following is one of the ways that white blood cells provide active immunity?
  • They destroy invading pathogens by eating them
  • They produce antibodies to destroy pathogens
  • They produce antitoxins that neutralise toxins from pathogens
  • They destroy pathogens by ingesting them
Q.6
Which of the following are the two main groups of white blood cells?
  • Phagocytes and lymphocytes
  • Stem cells and platelets
  • Macrophages and bacteriophages
  • Erythrocytes and monocytes
Q.7
The lymphocytes produce antibodies. How do antibodies work?
  • They penetrate inside the pathogen and destroy its nucleus
  • They penetrate inside the pathogen and change the chemical composition of the cytoplasm
  • They attach to the pathogens and cause them to clump together making it easy for phagocytes to find and ingest them
  • They attach to the pathogens and take them to the liver where they are destroyed
0 h : 0 m : 1 s