Examlex
All of the following are physical barriers to pathogens, except ______.
Contamination
The presence of unwanted substances or qualities in something that make it impure or unsuitable for use.
Longitudinal Studies
Research methods that involve repeated observations of the same variables over short or long periods of time.
Crying Relieves Tension
Indicates the common belief that crying can help reduce emotional stress and provide a sense of relief.
Health Psychologist
A professional specializing in how psychological, biological, and social factors affect health and illness.
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