Question

question 11
2.5 pts
_____________________ are the reason blood incompatibility occurs.
○ haptens
○ antigenicity
○ super antigens
○ alloantigens
question 12
2.5 pts
_____________________ activate t cells at a rate 100 times greater than ordinary antigens
○ super antigens
○ alloantigens
○ haptens
○ epitopes

Explanation:

Question 11

Blood incompatibility is due to alloantigens (antigens from different individuals of the same species, like blood group antigens). Haptens are small molecules needing carriers, antigenicity is a property, super antigens cause excessive immune response but not blood incompatibility.

Super antigens activate T - cells much more (100x) than ordinary antigens. Alloantigens relate to blood, haptens need carriers, epitopes are antigenic determinants.

Answer:

D. alloantigens

Question 12