M3 Flashcards
Immune response abates with time due to:
Feedback regulation
Skin, lactic acid secretions, stomach acidity, and the motion of cilia represent which type of defense:
A. Acquired B. Adaptive C. Natural D. Physical
D
Name the cell which receives antigen presented by MHC molecule:
T cells
An experiment is conducted with human whole blood added to a culture of cells coated with immunoglobulin G. It is observed that a subset of lymphocytes can bind to these coated cells and destroy them. These lymphocytes express Fc receptor (CD16). Which of the following cells is most likely to function in this manner?
NK cells
Which is characteristic of variable regions of immunoglobulins:
A. Theyrepresentthecomplementbindingsite
B. They are the carboxy-terminal ends of the molecules
C. They occur on both the H and L chains
D. TheyrepresenttheFcreceptorbindingsite
E. Alloftheanswers
C
The antigen binding site on an antibody is called:
Paratope
Immature B cell:
A. None of the answers
B. Can change its specificity
C. Have surface IgM and IgD
D. Have surface IgM only
E. Have surface IgM and cytoplasmic IgM
E
Interleukin -2 receptor:
A. Produce alpha chain when activated
B. Internalize interleukin with 10-20 hours
C. Always has alpha and beta chains
D. Has low affinity when activated
A
A patient in septic shock caused by a gram negative bacterial infection has high fever and increase in acute phase proteins. Which cytokine is the most likely contributor to these symptoms:
A. TGF B. IL-2 C. IL-6 D. IL-7
C
A patient in septic shock caused by a gram negative bacterial infection has high fever and increase in acute phase proteins. Which cytokine is the most likely contributor to these symptoms:
A. IL-2 B. TGF C. IL-12 D. IL-7
C
