Examlex
The rate of return on total assets is calculated by first subtracting interest expense from net income and then dividing the result by average total assets.
Helper T Cells
White blood cells that play a critical role in the immune system by activating other immune cells to fight off infections.
Cytokines
Small proteins released by cells that have a specific effect on the interactions and communications between cells, often involved in immune responses.
Antigens
Substances that are recognized by the immune system and can elicit an immune response, often foreign proteins or polysaccharides found on pathogens.
Perforin
A protein secreted by natural killer cells and cytotoxic T lymphocytes to kill cells by forming pores in their membranes.
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