Open Question
A decrease in which population of lymphocytes would impair all aspects of an immune response? (a) cytotoxic T cells, (b) helper T cells, (c) regulatory T cells, (d) B cells, (e) plasma cells.
21. The Immune System
Antigens
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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.
Verified step by step guidance1
Understand the role of antigen-presenting cells (APCs): APCs are immune cells that capture antigens and present them on their surface to T cells, initiating an immune response.
Identify the common types of APCs: The primary APCs include dendritic cells, macrophages, and B cells. These cells are crucial for activating T cells by presenting antigens.
Evaluate each cell type in the list: 1. Macrophages are known APCs. 2. Neutrophils are not typically considered APCs. 3. B cells are also APCs. 4. T cells are not APCs; they are activated by APCs. 5. Plasma cells are differentiated B cells that produce antibodies, not APCs.
Match the identified APCs with the given options: From the evaluation, macrophages (1) and B cells (3) are APCs.
Select the correct answer based on the identified APCs: The correct answer is the option that includes both macrophages and B cells, which is '1 & 3.'
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