GENERAL CAUSES OF DISEASE
Human disease results from the action of various in-jurious agents
on cells and tissue, causing biochemi-cal or structural damage. Disease may be
caused by:
·
Impaired energy production (e.g., reduced nu-trition or reduced
availability of oxygen to tis-sues)
·
Impaired immune responses
·
Genetic abnormalities inherited from a parent or acquired by
radiation, viruses, drugs, or chemicals
·
Metabolic toxic agents such as alcohol, drugs, and heavy metals
·
Physical agents (e.g., mechanical trauma, heat and cold, radiation
injury)
·
Chemical agents such as industrial and agricul-tural chemicals and
toxic waste
·
Infectious agents
·
Abnormal development and growth.
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