EHST 2110 ECU Questions and Answers
100% Correct
List the determinants of health - ANSWER - Life-style
Genetics
Environment
Medical care
List four known causative agents of disease related to environmental effects - ANSWER -
biological agents
chemical agents
physical agents
too little of something
Define chemical agents - ANSWER - substances that cause disease because of their mass or
ability to engage in chemical reactions with molecules in the body
Give three examples of chemical agents - ANSWER - cleaning agents
pesticides
petroleum
parasitic worms are biological agents that live either on or in humans and are considered: -
ANSWER - metazoa
What are possible portals of entry in humans for disease - ANSWER - respiratory tract
digestive tract
skin
reproductive organs
, Define ecosystems - ANSWER - Functional units of nature in which living organisms interact
with each other and with the non-living components of their environment to process energy and
cycle nutrients
List two species that are affected by removal of Beavers in an ecosystem - ANSWER - fish and
waterfowl
All energy is moving toward an ever less available and more dispersed state is the definition of:
- ANSWER - entropy
Define environmental health - ANSWER - - The relationship between the environment and
health. It encompasses control of environmental factors and aims to prevent disease
- All the physical, cchemical, and biological factors external to a person, and all the related
behaviors
Among the world's industrialized nations, which has the ehighest population growth rate? -
ANSWER - The United States
Define demographic transition - ANSWER - A fall in death rates, followed by a fall in birth rates
which usually occurs as a traditional society becomes industrailized
Which area of the world currently has the longest doubling time? - ANSWER - Europe
Which area of the world today is experiencing the highest growth rates? - ANSWER - Africa
Define doubling time - ANSWER - the time required for a population to double its size
Define growth rate - ANSWER - rate of natural increase, death rate subtracted from birth rate,
expressed as a percentage
How are doubling time and growth rate related? - ANSWER - The higher the growth rate, the
lower the doubling time. It is an inverse relationship because as one increases (growth rate),
one decreases (doubling time).
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