What is the substance in tobacco products that causes stained teeth and skin?

2 answers:

4 0

<span>The teeth and the skin tend to be stained by the action of nicotine and tar. Nicotine is a substance that is extracted from the leaves of tobacco and that can also be produced synthetically; It is a toxic drug that in small doses produces euphoria, decreased appetite, etc., and in high doses can cause serious poisoning.</span>

Inessa05 [86]3 years ago

3 0

Nicotine and Tar are the two major components of tobacco that causes teeth staining. Just like our skin, our teeth have pores, which can easily absorb nicotine and tar and turn white teeth yellow. Although nicotine itself is colorless but when it combines with oxygen it turns yellow. Even nicotine infuses electronic cigarettes causes teeth discoloration.

Most people have dark brown stains on their teeth, it is because of the way they consume tobacco. When tobacco is chewed along with saliva, it produces dark brown liquid which is extremely staining.

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Warm surface waters get depleted of nutrients and carbon dioxide, but they enrich again as they travel through ________ waters i

Nonamiya [84]

Answer: Option B. "Deep"

Explanation:

Thermohaline circulation helps to drive the global conveyor belt, which is a global-scale system of currents. Due to the movement of ocean currents through different polar regions, it allows depletion of nutrients and carbon dioxide at surface waters and get enrich again as move through deep waters in the conveyor belt.

Winds in the ocean helps to drive ocean currents in the upper ocean’s surface and these ocean currents moves below the ocean surface as well. the process that controls the movement of ocean current deep in the ocean is called Thermohaline circulation that is based on differences in the water’s density, and controlled by temperature (thermo) and salinity (haline).

Thermohaline circulation forms in the polar regions of Earth. Ocean water in the polar region gets colds that allows the formation of sea ice, which in turn make the surrounding seawater saltier and increases the ice density and sinks. This allows the deep-ocean currents to drive the Global conveyer belt.

The conveyor belt starts from the surface of North Atlantic pole, where seawater become saltier and ice starts sinking. This deep water heads south along the western Atlantic basin. The conveyor belt get recharged as it travels along the coast of Antarctica and carries more cold, salty, dense water. The current get divided into two different sections, one traveling to the Indian Ocean and the other moves into the Pacific Ocean. The two sections of the current get warm and rises, as they travel northward, then turn back around westward and southward.

The warmed surface waters continue to circulate around the globe and follows depletion of nutrients and carbon dioxide. But they get enrich again when they travel through deep waters all around the the Global conveyer belt.

Hence, the correct answer is option is B "Deep".

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3 years ago

Which is the role of restriction enzyme.

Murljashka [212]

<span>The role of a restriction enzyme is essentially used to cut a single gene from a larger piece of DNA. It has a very important role to play in experiments investigating cloning, and in the construction of particular DNA molecules.</span>

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3 years ago

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Which of the following best describes a weak base?

8_murik_8 [283]

The answer to your question is D

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What is the most likely explanation for the smaller size of the hypoxic zone in the year 2000?

Irina-Kira [14]

Due to the reduction in large industrial emmissions such as fertilizers into water zones.

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