Textbook Question
An axenic environment is one that:
a. Exists in the human mouth
b. Contains only one species
c. Exists in the human colon
d. Both a and c
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1. Introduction to Microbiology
Introduction to Microbiology
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Which of the following cells is not an antigen-presenting cell (APC)?
A
Dendritic cell
B
Neutrophil
C
B cell
D
Macrophage
Verified step by step guidance1
Step 1: Understand what an antigen-presenting cell (APC) is. APCs are immune cells that process and present antigens on their surface to T cells, initiating an adaptive immune response.
Step 2: Identify the common types of APCs. The primary APCs include dendritic cells, macrophages, and B cells, all of which can present antigens using MHC class II molecules.
Step 3: Review the role of neutrophils. Neutrophils are primarily involved in innate immunity and act as phagocytes to engulf pathogens, but they do not typically present antigens to T cells.
Step 4: Compare each cell type in the list to the definition of APCs. Dendritic cells, macrophages, and B cells all function as APCs, while neutrophils do not.
Step 5: Conclude that neutrophils are not antigen-presenting cells because they lack the necessary machinery and function to present antigens to T cells.
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