BIOs 224 Lab Blood Test

SUBSCRIBE

BIOs 224 Lab Blood Test

• Red blood cell membranes have

–Answer

• agglutinogens that specify that individual's blood type.
• ABO and Rh antigens

–Answer

• cause the most vigorous and potentially fatal transfusion reactions
• A person with type O blood has two recessive alleles and has neither the type A nor type B

antigen. True or false?–Answer

• True
• Antibodies to the A and B antigens are

–Answer

• found preformed in the blood plasma.
• Why are individuals with the AB+ blood type known as universal recipients for blood

transfusions?–Answer

• They have both A and B antigens on the surface of their RBCs,

and their blood serum does not contain antibodies against A, B, or Rh antigens.

• To determine an individual's blood type, drops of the blood sample are mixed

–Answer

• separately with antiserum containing antibodies that recognize either type A antigens, type B

antigens, or Rh antigens.

• Antigens are present on

–Answer

• on all cells
• Which blood sample contained the rarest blood type?

–Answer 1 / 2

SUBSCRIBE

• AB- is the rarest blood type
• Which blood sample contained the universal donor?

–Answer

• type O-
• Which blood sample contained the universal recipient?

–Answer

• type AB+
• When transfusing an individual with blood that is compatible but not the same type, it is

important to separate packed cells from the plasma and administer only the packed cells. Why do you think this is done?–Answer

• the plasma contains the antobodies that can react with the recipients antigens on RBCs.
• who could donate blood to a person with type B+ blood.

–Answer

- B+, O-, B-

• Hematocrit

–Answer percentage of blood volume occupied by red blood cells

• buffy coat layer

–Answer -layer between plasma and blood -leukocytes and platelets

• The diagnosis of anemia indicates

–Answer

• a lower-than-normal hematocrit.
• Polycythemia refers to

–Answer

• a significant increase in RBCs.
• / 2