Question 233 :Blood Physiology Question _233:[html] To determine blood groups according to the Rh system, use: Bbl6epuTe OAMH OTBeT: a. Saline solution b. Synthetic Anti-D coliclones c. Plasma -substituting solutions d. Synthetic anti -A and anti -B coliclones

The correct answer is b. Synthetic Anti-D clones.<br /><br />In the Rh blood group system, the presence or absence of the Rh factor (also known as the D antigen) on the surface of red blood cells determines whether a person's blood is Rh positive or Rh negative. To determine a person's Rh blood group, synthetic Anti-D clones are used. These clones are antibodies that specifically target the D antigen. When mixed with a person's blood, if the D antigen is present, the Anti-D clones will cause agglutination (clumping) of the red blood cells, indicating that the person's blood is Rh positive. If there is no agglutination, the person's blood is Rh negative.<br /><br />Saline solution (option a) is simply a salt solution and does not contain any antibodies. Plasma-substituting solutions (option c) are used to treat conditions such as shock or blood loss, but they do not contain antibodies to determine blood groups. Synthetic anti-A and anti-B clones (option d) are used to determine blood groups according to the ABO system, not the Rh system.