Multiple Choice
Which type of immune response is most directly effective against extracellular bacteria?
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41. Immune System
Immune System
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Cells that produce MHC class II molecules are collectively referred to as:
A
plasma cells
B
cytotoxic T cells
C
natural killer (NK) cells
D
antigen-presenting cells (APCs)
Verified step by step guidance1
Understand the role of MHC class II molecules: These molecules are essential for the immune system, as they present antigens to helper T cells, initiating an immune response.
Learn which cells produce MHC class II molecules: MHC class II molecules are produced by specialized immune cells known as antigen-presenting cells (APCs). These include dendritic cells, macrophages, and B cells.
Differentiate APCs from other immune cells: Plasma cells, cytotoxic T cells, and natural killer (NK) cells do not produce MHC class II molecules. Plasma cells secrete antibodies, cytotoxic T cells destroy infected cells, and NK cells target cells without MHC molecules.
Recognize the function of APCs: APCs process and present antigens on their MHC class II molecules to helper T cells, which then activate other immune cells to respond to the pathogen.
Conclude that cells producing MHC class II molecules are antigen-presenting cells (APCs), as they are specifically designed to interact with helper T cells in the immune system.
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