Which of these statements pertain(s) to T cells? a. They...

Which of these statements pertain(s) to T cells?
a. They have specific receptors.
b. They recognize antigen presented by MHC proteins.
c. They are responsible for cell-mediated immunity.
d. They stimulate antibody production by B cells.
e. All of these are correct

Key Concepts

T Cell Help for Antibody Production

Helper T cells are essential in stimulating B cells to produce antibodies. Through specific signaling interactions, they promote B cell activation, proliferation, and differentiation into plasma cells, thereby linking cellular and humoral immune responses.

Cell-Mediated Immunity

T cells play a central role in cell-mediated immunity, which involves the direct elimination of infected or malignant cells. This form of immunity does not rely on antibodies but rather on the actions of cytotoxic T cells and the regulatory functions of helper T cells.

Antigen Presentation via MHC

T cells rely on the presentation of antigens bound to Major Histocompatibility Complex (MHC) proteins. This interaction is fundamental for T cell activation, ensuring that the immune system responds only when foreign peptides are displayed by antigen-presenting cells.

T Cell Receptors

T cells possess unique receptors on their surface that allow them to specifically recognize peptide fragments. These receptors are crucial for the identification of antigens, distinguishing between self and non-self, and initiating appropriate immune responses.

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