Anaphylaxis is a life-threatening allergic reaction that can cause a rash, symptoms of shock, low blood pressure, and closed airways. An autoinjector can be used to administer synthetic epinephrine to a patient suffering from anaphylaxis. What are the effects of epinephrine that can help save a person’s life? Bronchioles dilate. Bronchioles close. Breathing rate decreases. Breathing rate increases. Blood pressure increases. Blood pressure decreases. Heart rate increases. Heart rate decreases.

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.