Immune System 11-20

Question 1

Cytokines are NOT:

Answer 1

Antigen-specific.

Question 2

A fundamental difference between the antigen receptors on B cells (BCR) and on T cells (TCR) is their:

Answer 2

Different requirements for antigen presentation.

Question 3

Genes for immunoglobulins (antibodies) are unlike other human genes in that:

Answer 3

Genes segments must be spliced together to make each unique antibody molecule.

Question 4

Humoral immunity can be acquired passively by:

Answer 4

Receiving serum from someone who has recovered from an infection.

Question 5

Inflammation does NOT involve:

Answer 5

Secretion of antibodies.

Question 6

Innate immune responses are most effective against:

Answer 6

Common antigens on bacteria.

Question 7

Lymphocytes aquire their antigen specificity:

Answer 7

Before they encounter antigen.

Question 8

A secondary immune response is NOT:

Answer 8

Preceded by a longer lag period than a primary response.

Question 9

Antibody effector functions include all of the following EXCEPT:

A. activating complement on bacterial surfaces to promote phagocytosis by neutrophils.
B. binding extracellular viruses to block their entry into host cells.
C. Binding intracellular viruses to initiate cytotoxicity.
D. blocking uptake of bacterial toxins by host cells.
E. coating bacteria to promote their phagocytosis by neutrophils.

Answer 9

C. Binding intracellular viruses to initiate cytotoxicity.

Question 10

Effector functions of complement include all of the following EXCEPT:

A. attracing phagocytes to the site of infection.
B. facilitating phagocytosis of complement-coated bacteria.
C. increasing blood vessel permeability to plasma proteins.
D. lysing bacterial cells.
E. Presenting antigen to B cells.

Answer 10

E. Presenting antigen to B cells.