Biology, 26.07.2019 21:00 libertycooper
Acute exposure to an environmental toxin a. involves low levels of exposure over long periods of time b. makes it difficult to associate the symptoms with a cause c. are high exposures over short times and associated with a specific cause d. is usually untreatable and fatal e. is the case with chronic alcohol and nicotine abuse
Answers: 1
Biology, 21.06.2019 17:10
Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.
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Biology, 21.06.2019 20:00
How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?
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Biology, 22.06.2019 01:00
Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation
Answers: 1
Biology, 22.06.2019 15:20
Use the numbers to place the companies in order of greatest comparative advantage to least comparative advantage in producing large tubes of toothpaste.
Answers: 3
Acute exposure to an environmental toxin a. involves low levels of exposure over long periods of ti...
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