Multiple Choice
Which of the following best describes T lymphocytes?
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21. The Immune System
Introduction to T Lymphocytes
Multiple Choice
Which of the following cells typically express MHC class II proteins on their surface?
A
Cytotoxic T cells
B
B lymphocytes
C
Muscle cells
D
Red blood cells
Verified step by step guidance1
Step 1: Understand the role of MHC class II proteins. MHC class II proteins are molecules expressed on the surface of certain immune cells that present antigens to helper T cells, initiating an immune response.
Step 2: Identify the types of cells that typically express MHC class II proteins. These are antigen-presenting cells (APCs), which include B lymphocytes, macrophages, and dendritic cells.
Step 3: Eliminate options that do not express MHC class II proteins. Cytotoxic T cells, muscle cells, and red blood cells do not function as antigen-presenting cells and therefore do not express MHC class II proteins.
Step 4: Focus on B lymphocytes. B lymphocytes are a type of white blood cell that plays a key role in the adaptive immune system. They express MHC class II proteins to present antigens to helper T cells.
Step 5: Conclude that the correct answer is B lymphocytes, as they are the only option provided that typically expresses MHC class II proteins on their surface.
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