Directions: Answer the following questions in complete sentenceson a blank sheet of lined paper. Be prepared to show your work for credit and discuss your answers with your classmates.

  1. How many different types of human blood exist?
  2. What are antigens?
  3. How does your body respond to unrecognized antigens?
  4. What two types of agglutinogens can human red blood cells have?
  5. If you have type A blood, what type of antibody does your body produce?
  6. What is the difference between AB blood and O blood in terms of transfusions?