Immunity

• • Provides individual with protection or defense from disease
  • Can include abnormal function leading to health problems
  • Normal physiological responses to foreign antigens (Proteins and microorganism)
  • Associated with inadequate or excessive immune response
• Serve three function

  1. Defense
  2. Homeostasis
  3. Surveillance
• Suppressed immune response

  • Ineffective immune response
  • Not able to differentiate (blind)
  • Failure to respond appropriately
  • Immunosuppression/immunodeficiency
  • Lead to infection
• Optimal immune response

  • Able to differentiate between host and foreign protein
• Exaggerated immune response

  • Over/hype functioning
  • Not able to differentiate (suspicious)
  • Attacks its own cell
  • Hyperactive/hyperimmune
  • Lead to allergy
• Innate immunity: You are born with this (skin)
• Acquired immunity: Develops during your lifetime
• Active immunity: Develops in response to an infection or vaccination

  • Natural: Antibodies developed in response of an infection
  • Artificial: Antibodies developed in response to a vaccination
• Passive immunity: Develops after you receive antibodies from someone else or somewhere else

  • Natural: Antibodies received from mom (milk)
  • Artificial: Antibodies received from a medicine
• Barriers to invasion