. Your task is to use your assigned scenario to create a 8-12 minute lecture with PPT as a visual aid.
.What is the principle?
What are the facts, rules, and definitions of the principle?
Why is it relevant to the scenario?
How is the relevant?
DDT (dichloro-diphenyl-trichloroethane) was developed as the first of the modern synthetic
insecticides in the 1940s. It was initially used with great effect to combat malaria, typhus, and
the other insect-borne human diseases among both military and civilian populations. It also was
effective for insect control in crop and livestock production, institutions, homes, and
gardens. DDT’s quick success as a pesticide and broad use in the United States and other
countries led to the development of resistance by many insect pest species. the U.S.
Environmental Protection Agency in 1970, began regulatory actions in the late 1950s and 1960s
to prohibit many of DDT’s uses because of mounting evidence of the pesticide’s declining
benefits and environmental and toxicological effects. The publication in 1962 of Rachel
Carson’s Silent Spring stimulated widespread public concern over the dangers of improper
pesticide use and the need for better pesticide controls. DDT is known to be very persistent in the
environment, will accumulate in fatty tissues, and can travel long distances in the upper
atmosphere. Taken from https://www.epa.gov/ingredients-used-pesticide-products/ddt-briefhistory-and-status
Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless,
and almost odorless crystalline chemical compound, an organochlorine. DDT has a
high efficiency as a contact poison against many arthropods. In insects, DDT
opens sodium ion channels in neurons, causing them to fire spontaneously, which
leads to spasms and eventual death. Insects with certain mutations in their sodium
channel gene are resistant to DDT and similar insecticides.
Taken from https://en.wikipedia.org/wiki/DDT
For this scenario, explain the following biological principles then connect them to the
scenario above.
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Nerve impulses
•
Cellular respiration
•
Properties of cell membrane
•
Diffusion
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One more biological principle we studied this semester of your choosing
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