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arsen [322]
2 years ago
12

An antigen can induce an immune response in a host organism. Antigens are targeted by antibodies that are produced by the organi

sm’s immune system in response to contact with the antigen. Antibodies are specific to antigens. Many different cell types are involved in immune responses. Which of the following best describes the role of cell-to-cell communication during a response to an invasion of antigens?
a. A macrophage cell engulfs a pathogen in the blood.
b. Antigens attaching to receptors on memory B cells stimulate the memory B cells to become plasma cells.
c. Antigen-presenting cells engulf antigens at the first exposure.
d. Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
Biology
1 answer:
Trava [24]2 years ago
6 0

chemicals that are secreted from antigen-presenting cells then activate helper T cells describes the role of cell-to-cell communication during a response to an invasion of antigens.

Explanation: Antibodies are present on the surface of the cells, and binds specifically to antigens and can also engulf pathogen and process these cells presenting them to MHC class 2. This complex is activated by helper T cells to secrete antibodies and macrophages. This interaction of B-cell and MHC class 2 complex with helper T cell is cell-mediated immune response.

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Andreyy89

Answer:

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Suppose a human blood cell containing a 0.9 percent solute concentration were put into a container of 0 percent solute solution
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Answer and explanation:

If a human blood cell with a 0.9% solute concentration were to be put into a container of 0% solute solution, the cell would get BIGGER.

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