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Microbiology
Learn the toughest concepts covered in Microbiology with step-by-step video tutorials and practice problems by world-class tutors.
20. Adaptive Immunity
Antigens
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1
concept
Antigens
3m
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2
Problem
Epitopes are:
A
A portion of an antibody molecule.
B
A portion of antigen recognized by antibody.
C
T cell receptors.
D
A molecule that binds to antigens.
3
concept
Free Antigens vs. Presented Antigens on APCs
4m
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4
Problem
Which of the following cell types are antigen-presenting cells (APCs).
1. Macrophages 2. Neutrophils 3. B cells 4. T cells 5. Plasma Cells
A
1 & 3.
B
4 & 5.
C
1, 2 & 3.
D
1 & 2.
E
3 & 4.
5
Problem
Many phagocytic immune cells such as macrophages and dendritic cells commonly engulf foreign or dangerous materials in the body. If these cells engulf antigens, the cells will present the antigens on their surface. Which immune cells will respond to these “presented” antigens and trigger an immune response if necessary?
A
B cells.
B
Plasma cells.
C
T cells.
D
Monocytes.