41) Antigen presentation is essential for the activation and clonal selection of:

A) T cells

B) B cells

C) plasma cell

D) antigen-presenting cells

E) antibodies

42) An isograft is a tissue graft donated by:

A) an unrelated person

B) a parent

C) a different animal species

D) the same person

E) an identical twin

43) Which one of the following is NOT a type of immunosuppressive therapy given after surgery to prevent rejection of a graft:

A) corticosteroids

B) radiation

C) antiproliferative drugs

D) gamma globulin

E) immunosuppressive drugs

44) Which of the following is often used to treat allergies:

A) corticosteroids

B) antihistamines

C) blood transfusions

D) bone marrow transplants

E) immunosuppressor drugs

45) Allergic contact dermatitis following skin contact with poison ivy would normally lead to:

A) immediate hypersensitivity

B) acute hypersensitivity

C) delayed hypersensitivity

D) anaphylactic shock

E) immunodeficiency

46) The relatively common autoimmune disease in which the thyroid gland produces excessive amounts of thyroxine is called:

A) multiple sclerosis

B) Graves’ disease

C) myasthenia gravis

D) glomerulonephritis

E) systemic lupus erythematosis

47) Which one of the following is NOT an autoimmune disease:

A) AIDS

B) multiple sclerosis

C) Graves’ disease

D) type I diabetes mellitus

E) rheumatoid arthritis