Defence Physiology

Defence physiology illustrates changes that happen as a response to a potential risk, for example, planning for the fight-or-flight response. It prepares the body to deal with the threat or stress. Natural barriers and the immune system shield the body against infectious organisms that can harm the normal human physiological processes. Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid. The immune system uses different types of white blood cells and antibodies to identify and kill organisms.


  • Track 1-1 Hormones
  • Track 2-2 Receptors
  • Track 3-3 Antibodies
  • Track 4-4 Immunoglobulins

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