Inflammation _____

A. Diapedesis, during which cells line up against the capillary wall:Diapedesis refers to the movement of leukocytes through the capillary wall into tissues, not the lining up of cells. The lining-up process along the capillary wall is called margination.

B. Mainly neutrophil and macrophage migration into inflamed areas:Phagocyte mobilization involves the recruitment of neutrophils and macrophages to sites of infection or tissue damage. These cells migrate from the bloodstream into inflamed tissue to engulf pathogens and debris, forming a critical part of the innate immune response.

C. Monocytes as the most active phagocyte:While monocytes differentiate into macrophages in tissues, neutrophils are typically the first and most active phagocytes during the early stages of inflammation. Monocytes/macrophages arrive later and assist in cleanup and repair.

D. Margination, which is the process of white cell movement through the walls of capillaries into injured tissues:Margination is the process by which leukocytes adhere to the capillary walls, preparing for diapedesis. It does not describe the actual migration of cells through the capillary walls into tissues.

A. Antigenic:“Antigenic” is not a classification of T cells. It describes a property of a substance that can trigger an immune response, not a type of T lymphocyte.

B. Cytotoxic:Cytotoxic T cells (CD8+) directly kill infected or abnormal cells. They are a major type of T cell responsible for cell-mediated immunity and defense against viruses and cancer cells.

C. Regulatory:Regulatory T cells (Tregs) modulate the immune response by suppressing excessive or inappropriate activation. They help maintain immune tolerance and prevent autoimmune reactions.

D. Helper:Helper T cells (CD4+) assist other immune cells by releasing cytokines that stimulate B cells, cytotoxic T cells, and macrophages. They are essential for orchestrating the adaptive immune response.