Mr. & Mrs. Smith s Blood Tests

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Mr. & Mrs. Smith s Tests Mr. Smith Mrs. Smith Type A Test Type B Test

Mr. & Mrs. Jones Tests Mr. Jones Mrs. Jones Type A Test Type B Test

Child 1 & 2 s Tests Child 1 Child 2 Type A Test Type B Test

Samples & Anti-Sera Mr. Jones Mrs. Jones Mr. Smith s Mrs. Smith s Child 1 s Child 2 s Anti-A Serum (Blue) Anti-B Serum (Yellow)

Lab: Typing Background: Refer to the Typing Reading. Purpose: To identify the antigens and antibodies present on the red blood cells for each blood type. To recognize agglutination in a blood test and determine the corresponding blood types of each individual. To use a Punnett Square to determine the most probable parents of a child based on the results from the blood test. Materials: 6 dropper bottles of simulated blood 1 dropper bottle of Anti-A Serum 1 dropper bottle of Anti-B Serum glass slides Procedure: 1. Shake all dropper bottles of simulated blood well before starting. 2. Add 1 drop of each person s simulated blood on the appropriate slides as labeled by the placemat. 3. To one of the two slides for each person, add 1 drop of the Anti-A Serum (blue) to the blood. 4. To the second slide for the same person, add 1 drop of the Anti-B Serum (yellow) to the blood. 5. Allow it to sit for at least 20 minutes. 6. Check each slide for agglutination (blood clumping). Cloudy, solid particles forming in the blood is evidence of agglutination. Record + for agglutination and for no agglutination into the table. 7. Determine the blood type for each person according to the results.

Lab: Typing Title: Purpose: Materials: Procedure: See handout. Results: Table 1. Mr. Jones Mrs. Jones Mr. Smith Mrs. Smith Child 1 Child 2 Agglutination with Anti-A Serum Agglutination with Anti-B Serum Type Discussion: Write a paragraph explaining the results. What did you learn? What were your sources of error, and what are your ideas for further experimentation in this investigation? Conclusion: Briefly restate the significant results in a conclusion statement. Pre-Lab Questions: 1. What is agglutination? 2. Who was awarded the Nobel Prize for his research in determining blood types? When? 3. What are antigens? Where are they located? 4. What are antibodies? Where are they located?

5. What happens when incompatible blood types are mixed? 6. What is the Rh factor? 7. Sketch a red blood cell that is Rh+. 8. What will happen if a blood type A patient with A antigens is mixed with blood that has A antibodies? 9. Which blood type can donate blood to anyone? Why? Which blood type can receive blood from everyone? Why? 10. Play the Internet Typing Lab at http://www.nobel.se/medicine/educational/landsteiner/ and complete the table below. Patient Agglutination in Tube A Agglutination in Tube B Agglutination in Tube Rh Type Red-Haired Girl Spike-Haired Boy Grandpa Types of Transfused Successfully 11. Complete the table below. Type Antigens Antibodies A B AB O Can Give to Can Receive from Post-Lab Questions: 1. Who is the child of Mr. & Mrs. Jones? Complete the Punnett square to the right prove this. Highlight or color the box that represents this child. 2. Who is the child of Mr. & Mrs. Smith? Complete the Punnett square to the right to prove this. Highlight or color the box that represents this child.

Groups, Typing and Transfusions The discovery of blood groups Experiments with blood transfusions, the transfer of blood or blood components into a person's blood stream, have been carried out for hundreds of years. Many patients have died and it was not until 1901, when the Austrian Karl Landsteiner discovered human blood groups, that blood transfusions became safer. Mixing blood from two individuals can lead to blood clumping or agglutination. The clumped red cells can crack and cause toxic reactions. This can have fatal consequences. Karl Landsteiner discovered that blood clumping was an immunological reaction which occurs when the receiver of a blood transfusion has antibodies against the donor blood cells. Karl Landsteiner's work made it possible to determine blood types and thus paved the way for blood transfusions to be carried out safely. For this discovery he was awarded the Nobel Prize in Physiology or Medicine in 1930. What is blood made up of? An adult human has about 4 6 liters of blood circulating in the body. Among other things, blood transports oxygen to various parts of the body. consists of several types of cells floating around in a fluid called plasma. The red blood cells contain hemoglobin, a protein that binds oxygen. Red blood cells transport oxygen to, and remove carbon dioxide from, the body tissues. The white blood cells fight infection. The platelets help the blood to clot, if you get a wound for example. The plasma contains salts and various kinds of proteins.

What are the different blood groups? The differences in human blood are due to the presence or absence of certain protein molecules called antigens and antibodies. The antigens are located on the surface of the red blood cells and the antibodies are in the blood plasma. Individuals have different types and combinations of these molecules. The blood group you belong to depends on what you have inherited from your parents. There are more than 20 genetically determined blood group systems known today, but the AB0 and Rh systems are the most important ones used for blood transfusions. Not all blood groups are compatible with each other. Mixing incompatible blood groups leads to blood clumping or agglutination, which is dangerous for individuals. Nobel Laureate Karl Landsteiner was involved in the discovery of both the AB0 and Rh blood groups. AB0 blood grouping system According to the AB0 blood typing system there are four different kinds of blood types: A, B, AB or 0 (null). group A If you belong to the blood group A, you have A antigens on the surface of your red blood cells and B antibodies in your blood plasma. group B If you belong to the blood group B, you have B antigens on the surface of your red blood cells and A antibodies in your blood plasma. group AB If you belong to the blood group AB, you have both A and B antigens on the surface of your red blood cells and no A or B antibodies at all in your blood plasma. group 0 If you belong to the blood group 0 (null), you have neither A or B antigens on the surface of your red blood cells but you have both A and B antibodies in your blood plasma.

Rh factor blood grouping system Many people also have a so called Rh factor on the red blood cell's surface. This is also an antigen and those who have it are called Rh+. Those who haven't are called Rh-. A person with Rh- blood does not have Rh antibodies naturally in the blood plasma (as one can have A or B antibodies, for instance). But a person with Rh- blood can develop Rh antibodies in the blood plasma if he or she receives blood from a person with Rh+ blood, whose Rh antigens can trigger the production of Rh antibodies. A person with Rh+ blood can receive blood from a person with Rh- blood without any problems. group notation According to above blood grouping systems, you can belong to either of following 8 blood groups: A Rh+ B Rh+ AB Rh+ 0 Rh+ A Rh- B Rh- AB Rh- 0 Rh- Do you know which blood group you belong to? typing how do you find out to which blood group someone belongs? 1. You mix the blood with three different reagents including either of the three different antibodies, A, B or Rh antibodies. 2. Then you take a look at what has happened. In which mixtures has agglutination occurred? The agglutination indicates that the blood has reacted with a certain antibody and therefore is not compatible with blood containing that kind of antibody. If the blood does not agglutinate, it indicates that the blood does not have the antigens binding the special antibody in the reagent. A person with A+ blood receives B+ blood. The B antibodies (yellow) in 3. If you know which antigens are in the person's blood, it's easy to figure out which blood group he or she belongs to!

the A+ blood attack the foreign red blood cells by binding to them. The B antibodies in the A+ blood bind the antigens in the B+ blood and agglutination occurs. This is dangerous because the agglutinated red blood cells break after a while and their contents leak out and become toxic. What is happening when the blood clumps or agglutinates? For a blood transfusion to be successful, AB0 and Rh blood groups must be compatible between the donor blood and the patient blood. If they are not, the red blood cells from the donated blood will clump or agglutinate. The agglutinated red cells can clog blood vessels and stop the circulation of the blood to various parts of the body. The agglutinated red blood cells also crack and its contents leak out in the body. The red blood cells contain hemoglobin which becomes toxic when outside the cell. This can have fatal consequences for the patient. The A antigen and the A antibodies can bind to each other in the same way that the B antigens can bind to the B antibodies. This is what would happen if, for instance, a B blood person receives blood from an A blood person. The red blood cells will be linked together, like bunches of grapes, by the antibodies. As mentioned earlier, this clumping could lead to death. transfusions who can receive blood from whom? Of course you can always give A blood to persons with blood group A, B blood to a person with blood group B and so on. But in some cases you can receive blood with another type of blood group, or donate blood to a person with another kind of blood group. People with blood group 0 are called "universal donors" and people with blood group AB are called "universal receivers." The transfusion will work if a person who is going to receive blood has a blood group that doesn't have any antibodies against the donor blood's antigens. But if a person who is going to receive blood has antibodies matching the donor blood's antigens, the red blood cells in the donated blood will clump. Group Antigens Antibodies Can give blood to AB A and B None AB A A B B B A 0 None A and B A and AB B and AB AB, A, B, 0 Can receive blood from AB, A, B, 0 A and 0 B and 0 0