Environmental Health and Disease Prevention
ICSE · Class 11 · Environmental Science
Flashcards for Environmental Health and Disease Prevention — ICSE Class 11 Environmental Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What are the three dimensions of health?
Answer
Health has three dimensions: physical health, mental health, and social health. Physical health means the proper functioning of the body and its organs. Mental health means being free from excessive s…
How does the environment affect human health?
Answer
Human health depends strongly on the environment. Clean air, safe drinking water, nutritious food, and hygienic surroundings support good health. Polluted air, contaminated water, poor sanitation, and…
Why can diseases act as indicators of environmental problems?
Answer
Certain diseases show that something is wrong in the surroundings. Breathing problems may suggest air pollution, malaria may suggest stagnant water and mosquito breeding, and digestive diseases may su…
Why is malaria common in areas with stagnant water?
Answer
Female Anopheles mosquitoes breed in stagnant water such as puddles, drains, ponds, and water collected in containers. More stagnant water means more mosquito breeding and a higher risk of malaria spr…
How is malaria transmitted?
Answer
Malaria is transmitted through the bite of infected female Anopheles mosquitoes. The mosquito picks up the Plasmodium parasite from an infected person and transmits it to a healthy person during the n…
Why is malaria not spread through direct contact?
Answer
Malaria needs a mosquito vector for transmission. It is a vector-borne communicable disease caused by Plasmodium, a protozoan parasite. Direct touch does not spread it.
What are the four Plasmodium species that cause malaria in humans?
Answer
The four Plasmodium species are Plasmodium falciparum, Plasmodium malariae, Plasmodium ovale, and Plasmodium vivax. Plasmodium falciparum is the most malignant form, and Plasmodium vivax is more commo…
How can malaria be prevented?
Answer
Prevention includes eliminating stagnant water, improving drainage, using mosquito nets and repellents, and preventing tree felling that creates water pools. Environmental management reduces mosquito …
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