CURRENT AFFAIRS

2019

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The researchers of which country have found that Electronic cigarettes damages brain stem cells?
A
India
B
Russia
C
China
D
US
Explanation: 

Detailed explanation-1: -US researchers have found that electronic cigarettes, often targeted at youth and pregnant women, produce a stress response in brain stem cells.

Detailed explanation-2: -Vaping may damage the brain: Inhaling high levels of nicotine can destroy stem cells that turn to neurons, study suggests. Trendy e-cigarettes may be damaging users’ brains, including those of the millions of teenagers that vape, a new study suggests.

Detailed explanation-3: -“The high levels of nicotine in ECs lead to a nicotine flooding of special receptors in the neural stem cell membrane,” Zahedi said. “Nicotine binds to these receptors, causing them to open up. Calcium and other ions begin to enter the cell. Eventually, a calcium overload follows.”

Detailed explanation-4: -The mitochondria then swell, changing their morphology and function. They can even rupture and leak molecules that lead to cell death. “If the nicotine stress persists, SIMH collapses, the neural stem cells get damaged and could eventually die,” Zahedi said.

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