Correct option is C
The correct answer is Nicotine.
Tobacco:
· Tobacco has been used by human beings for more than 400 years.
· It is smoked, chewed or used as a snuff.
· Tobacco contains a large number of chemical substances including nicotine, an alkaloid.
· Smoking is associated with an increased incidence of cancers of the lung, urinary bladder and throat, bronchitis, emphysema, coronary heart disease, gastric ulcer, etc.
· Tobacco chewing is associated with an increased risk of cancer of the oral cavity.
· Smoking increases the carbon monoxide (CO) content in blood and reduces the concentration of oxygen in the blood.
Nicotine:
· It's a naturally occurring chemical that contains nitrogen.
· It is heavily addictive.
Uses:
· Nicotine is used as a recreational drug because of its mood-altering and pleasure-inducing effects.
· It is also used as a treatment for addiction to tobacco.
· It is also used as a pesticide.
Thus, Nicotine is an alkaloid found in tobacco.
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Alkaloid:
· An alkaloid is a class of naturally occurring organic nitrogen-containing compounds that are frequently found in the plant kingdom.
· Many alkaloids are valuable medicinal agents that can be utilized to treat various diseases including malaria, diabetes, cancer, cardiac dysfunction etc.
Additional Information
Caffeine:
· Caffeine works by stimulating the central nervous system (CNS), heart, muscles, and the centres that control blood pressure.
· Caffeine can raise blood pressure, but might not have this effect on people who use it all the time.
· Caffeine can also act like a “water pill” that increases urine flow.
· It is found in tea and coffee.
Morphine:
· Morphine is a very effective sedative and painkiller.
· It is very useful in patients who have undergone surgery.
· Several plants, fruits and its seeds having hallucinogenic properties have been used for hundreds of years in folk medicine, religious ceremonies and rituals all over the globe.
Opioids:
· Opiates or drugs obtained from opium or artificially produced substitutes that have opium-like effects.
· They produce morphine-like effects.
· Medically they are primarily used for pain relief, including anaesthesia.
· Opioids are drugs, which bind to specific opioid receptors present in our central nervous system and gastrointestinal tract.
· Example: codeine, morphine, heroin.Top of Form
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