Final answer:
The antigen from an ingested bacterial cell is displayed on the antigen is displayed on the cell-surface of the macrophage and helper the T cells make direct contact with the macrophage to recognize the antigen.
So, the correct answer is option 1.
Step-by-step explanation:
After a macrophage ingests a bacterial cell, it uses fragments (antigens) from the bacterial cell to communicate and activate helper T cells. These antigens are displayed on the cell-surface of the macrophage. The macrophage uses MHC II molecules to present these antigens to the helper T cells, making direct contact necessary for T cell recognition and activation. Therefore, the correct statement is: The antigen is displayed on the cell-surface of the macrophage and helper T cells make direct contact with the macrophage to recognize the antigen.
Macrophages, being antigen-presenting cells (APCs), are crucial for activating the immune system. After engulfing and digesting pathogens, macrophages present processed antigens on their surface to helper T cells, leading to the activation of the adaptive immune response, which includes the recruitment and activation of more immune cells.
So, the correct answer is option 1.
Complete question:
After a macrophage ingests a bacterial cell, it uses fragments (antigens) from he bacterial cell to communicate and activate helper T cells that could help to activate the immune system. Identify the correct statement below.
- The antigen is displayed on the cell-surface of the macrophage and helper the T cells make direct contact with the macrophage to recognize the antigen.
- The macrophage releases the antigen which then diffuses a short distance to the T cells to activated them.
- The macrophage communicates with the T cell via endocrine signaling.
- The macrophage communicates with the T cell via paracrine signaling.