Correct Answer - Option 1 : nicotine
Explanation:
Tobacco:
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Tobacco smoke is made up of thousands of chemicals, including at least 70 known to cause cancer.
- The cancer-causing chemicals are known as carcinogens.
- Some of them are:-
- Nicotine
- Hydrogen cyanide
- Formaldehyde
- Lead
- Arsenic
Nicotine- C10H14N2
- 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.o
- It is also used as a treatment for addiction to tobacco.
- It is also used as a pesticide.
Thus, the main active constituent of tobacco is nicotine.
Opioids:
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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.
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.
Aspirin:
- Aspirin is a nonsteroidal anti-inflammatory drug (NSAID). It was the first of this class of drugs to be discovered.
- Aspirin, chemically known as acetylsalicylic acid.
- Aspirin is a common drug for relieving minor aches, pains, migraine headaches, and fevers.
- It is also used as an anti-inflammatory or a blood thinner.
