NEET2013BotanyEnvironmental IssuesActual
Which one of the following is not correct with regard to the harmful effects of particulate matter of the size 2.5 micro meters or less?
Options
- AIt can cause respiratory problems.
- BIt can directly enter into our circulatory system.
- CIt can cause inflammation and damage to the lungs.
- DIt can be inhaled into the lungs.
Correct answer
B. It can directly enter into our circulatory system.
Step-by-step solution
Particulate matter is divided into its sizes. Settleable ( PM >10 m ) and suspended (PM < 10 m ) . Particles less than 2.5 m diameter are most harmful. They pass deep into lungs, causing respiratory problem, cause inflammation and damage to the lungs. It cannot directly enter into our circulatory system, but through respiratory system. Related Theory Air Quality is measured using a metric called Air Quality Index (AQI). AQI will display the changes in air pollution in the atmosphere. Clean air is extremely importan