Which of the following cell types produce and release antibodies?

Rationale

Plasma B cells produce and release antibodies.

Plasma B cells, a sub-type of B cells, are the only cells among the given options that are responsible for the production and secretion of antibodies. They are a crucial part of the humoral immune response, which guards against pathogens present in body fluids.

A (Helper T cells) YOUR ANSWER

Helper T cells do not produce antibodies. Instead, they play a pivotal role in the immune response by activating other immune cells. They stimulate B cells to mature into Plasma B cells that produce and release antibodies, and they also activate Cytotoxic T cells.

B (Cytotoxic T cells) YOUR ANSWER

Cytotoxic T cells, also known as killer T cells, do not produce or secrete antibodies. They are involved in the cell-mediated immune response, where they directly attack and destroy infected cells or cancer cells. They use perforins and granzymes to induce apoptosis in the infected cells.

C (Plasma B cells) CORRECT

Plasma B cells are the main cells involved in producing and secreting antibodies. They differentiate from B cells when stimulated by Helper T cells. Once activated, they secrete large amounts of antibodies that are specific to the antigen that triggered the immune response.

D (Natural Killer cells) YOUR ANSWER

Natural Killer cells, like Cytotoxic T cells, do not produce antibodies. They are part of the innate immune system and play a critical role in the body's initial defenses against infections and tumors. They kill virus-infected cells and tumor cells by releasing cytotoxic granules that induce apoptosis.

Conclusion

Among the given cell types, only Plasma B cells are responsible for the production and secretion of antibodies. Helper T cells and Cytotoxic T cells are involved in cell activation and direct attack on infected cells, respectively, but they do not produce antibodies. Natural Killer cells, part of the innate immune system, kill infected cells but also do not produce antibodies. Thus, the correct answer is Plasma B cells.

Which of the following cell types produce and release antibodies?

Plasma B cells produce and release antibodies.

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