Blood Banking

Explanation
In emergency cases of blood transfusion, individuals with blood type A- can receive blood from individuals with blood type O+. This is because individuals with blood type A- have both A and Rh negative antigens, while individuals with blood type O+ have neither A nor Rh antigens. Therefore, there is no risk of an immune reaction when transfusing blood from type O+ to type A-.

Explanation
The given statement states that antigen A will coagulate with antibody B, and antibody B is compatible with antigen A. However, this statement is false because antibodies are specific to antigens, and antigen A can only coagulate with its compatible antibody, not with antibody B.

Explanation
Whole blood is not used for crossmatching. Crossmatching is a laboratory test performed to determine compatibility between the donor's blood and the recipient's blood before a blood transfusion. In crossmatching, only specific components of blood, such as red blood cells and plasma, are mixed together to check for any reactions or compatibility issues. Using whole blood for crossmatching would not provide accurate results as it contains all components of blood, including white blood cells and platelets, which are not necessary for this particular test.

Explanation
Antisera are indeed used for blood typing. Antisera are a type of serum that contains antibodies specific to certain blood antigens. When testing blood for compatibility or identifying blood types, antisera is used to determine the presence or absence of specific antigens on the red blood cells. By observing the reaction between the antisera and the blood sample, blood typing can be accurately determined. Therefore, the statement "antisera are used for blood typing" is true.

Explanation
ABO compatibility refers to the compatibility of blood types between a donor and recipient. It is based on the presence or absence of A and B antigens on the red blood cells. RH positivity, on the other hand, refers to the presence of the Rh antigen on the red blood cells. ABO compatibility and RH positivity are two separate factors that need to be considered when matching blood types for transfusions. Therefore, RH positivity is not included in ABO compatibility.