Examlex
If economic resources were perfectly adaptable to alternative uses, then there would be constant opportunity costs along the production possibilities curve.
Immune System
The body's defense mechanism against infections, diseases, and other foreign substances.
Prolonged Stress
A state of continuous stress exposure over a lengthy period, potentially leading to adverse health effects, including psychological and physical problems.
Antigens
Substances that the body recognizes as foreign and that can elicit an immune response.
Pathogens
Microorganisms or agents, such as bacteria, viruses, fungi, or parasites, that cause disease.
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