Innate immunity 8-14

Question 1

Early induced immune responses are like adaptive immunity in that they:

Answer 1

involve macrophages and complement.

Question 2

Selectins:

Answer 2

Are present in both leukocytes and vaskular endothelial cells.

Question 3

Lymphocyte recirculation:

Answer 3

Occurs for both naive and effector lymphocytes.

Question 4

Phagocytes kill bacteria using all of the following EXCEPT:

A. H2O2
B. hydrolytic enzymes.
C. low pH.
D. lysozyme.
E. Strong reducing agents.

Answer 4

E. Strong reducing agents.

Question 5

For a curculating neutrophil to reach the site of innflammation, it must bind to blood vessel endothelial cell and then pass between the endothelial cells in a process called:

Answer 5

Extravasation

Question 6

Macrophages are attracted to the site of infection by all of the following EXCEPT:

A. bacterial peptides.
B. chemokines.
C. C5a.
D. IL-8.
E. MAdCAM.

Answer 6

E. MAdCAM.

Question 7

Inflammatory cytokines produced by macrophages activate all of the following EXCEPT:

A. B cells to secrete acute phase proteins.
B. integrin on leukocytes to bind more strongly to vascular CAMs.
C. neutrophils to be more cytotoxic.
D. NK cells to kill virus-infected cells.
E. vascular endothelium to increase expression of CAMs.

Answer 7

A. B cells to secrete acute phase proteins.