Final answer:
Natural Killer (NK) cells play a crucial role in protecting the body by recognizing and eliminating infected, cancerous, and stressed cells through cytokine regulation and various immune responses.
Explanation:
Natural Killer (NK) cells protect the body by recognizing and killing infected cells, cancer cells, and stressed cells. They produce cytokines that regulate body defenses and play a role in the adaptive immune response through processes like antibody-dependent cellular cytotoxicity. NK cells use a dual receptor system to determine whether to kill or not kill cells displaying stress-induced molecules.
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