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When entry barriers into a market are low, firms will tend to earn zero economic profit in the long run because
Macrophages
A type of white blood cell that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells in a process known as phagocytosis.
Cytokines
Small proteins released by cells that have a specific effect on the interactions and communications between cells, especially in immune responses.
T Helper Cells
A subtype of white blood cells that play a crucial role in the immune system by assisting other cells in immunological processes.
B Cells
A type of white blood cell part of the immune system, responsible for producing antibodies to fight infections.
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