Biology, 07.07.2019 06:30 Ap621765

Which role do ultrafine particles play in dirty air? a) they contribute to less than 13,000 premature deaths a year. b) they can worsen symptoms for people with breathing difficulties. c) they are easily removed from the air when people see them floating. d) they are constantly filtered by the nose, which prevents lung absorption

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The UFPs or the ultrafine particles refers to the particulate matter of nanoscale size, that is, less than 0.1 micrometer or 100 nanometers in diameter. The ultrafine particles are mainly obtained from the vehicular discharges and are found in the greatest amount on the freeways.

It has been shown that the ultrafine pollution particles may result in an essential function in stimulating supplementary pathways or inflammation, which elevates the condition of asthma. The ultrafine particles discharged by vehicles and other sources of combustion are enveloped with a layer of organic chemicals, which can be discharged into the lungs.

These chemicals produce free oxygen radicals that stimulate the immune system in the lung via a cell-tissue destructing procedure called oxidation. Oxidation aggravates the allergic inflammation in the lungs of the individuals suffering from asthma.

Hence, the correct answer is option B, that is, they can worsen the symptoms for the people with breathing issues.

Answer from: winnie45

According to E202, the correct answer to this question is the second choice. They can worsen symptoms for people with breathing difficulties.

Answer from: Quest

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.

Answer from: Quest

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

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Which role do ultrafine particles play in dirty air? a) they contribute to less than 13,000 prematu...

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