Cell-mediated responses most effectively target . a. intracellular pathogens b. extracellular p

step 1 This question we're looking at the cell -mediated responses. Do they most effectively target? In

Cell-mediated responses most effectively target . a....

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Key Concepts

Cancerous Cells

Cancerous cells are abnormal cells that have undergone malignant transformation and can proliferate uncontrollably. The cell-mediated immune system plays a key role in cancer immunosurveillance by detecting and eliminating these transformed cells through mechanisms involving T lymphocytes, such as natural killer cells and cytotoxic T cells, underscoring its importance in protecting the body against cancer development.

Cell-mediated Immunity

Cell-mediated immunity is the branch of the immune system that primarily involves T lymphocytes, such as cytotoxic T cells and helper T cells, to identify and eradicate cells harboring pathogens or abnormal changes. Unlike humoral immunity, which works through antibodies, cell-mediated immunity directly targets and destroys infected or malignant cells, making it essential for eliminating intracellular pathogens and cancerous cells.

Intracellular Pathogens

Intracellular pathogens are microorganisms, such as viruses and certain bacteria, that invade and replicate within host cells. Because these pathogens reside inside cells, they are less accessible to antibodies and are primarily targeted by the cell-mediated immune response, specifically through the action of cytotoxic T lymphocytes which can recognize and kill infected cells.

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