Allergy is a ________ response to __________ antigens.

Allergy is a ________ response to __________ antigens.
  a. hypersensitive; environmental
  b. hyposensitive; cellular
  c. normal level; microbial
  d. mixed; protein
  e. mixed; microbial

Question 2

Which of the following statements about tissue transplants is true?
  a. The source of graft rejection is T cell recognition of the MHC antigens on the transplanted
  cells.
  b. If transplants demonstrate a perfect match for all Rh antigens, then there is a 95 success
  rate.
  c. Successful transplants require a complete match of all MHC antigens.
  d. Xenotransplantation avoids the fundamental transplant mechanism of graft rejection.
  e. Skin can be successfully transplanted between siblings and other closely related family
  members