Short answer test 1

• What antigens and antibodies are on A+

  antigens - A, D

  Antibodies - anti-b-antibody
• antigens and antibodies on AB-

  A,B antigen, no antibodies
• O+


  d antigen, A and B antibody
• What are the three steps of platelet plug formation?

  1. Platelet adhesion
  2. Release reaction
  3. Platelet aggregation
• Platelet adhesion


  platelets stick to exposed collagen fibers of the damaged endothelium
• Release reaction

  platelets extend projections and degranulate releasing thromboxane A2, serotonin, ADP - which lead to constriction of blood vessels, and activate other platelets.
• Platelet Aggregation


  platelets get sticky and form plug which get reinforced by fibrin threads during clotting process
• function of Neutrophil

  • first to arrive
  • contains lysozyme, defensins and superoxidants
• function of basophil

  releases histamine and other inflammatory chemicals

  stimulates inflammatory response
• function of eosinophil

  • kills parasitic worms
  • leave cappillaries to tissue
  • release histaminase to combat allergic reaction