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T3 CH4 Chemistry in Daily Life — Science STD 7 — Question

Tamilnadu BoardEnglish MediumSTD 7ScienceT3 CH4 Chemistry in Daily Life3 Marks
Question
Explain briefly about antibiotic and analgesic?
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Answer

  • Antibiotic
  1. Many micro organisms and plants synthesize chemicals which are toxic in nature to protect them from invading organisms.
  2. Those biosynthesized chemicals can be isolated from the plants/micro organisms and was used as medicines against infectious diseases, these substances were called as antibiotics.
  3. Ex: Chloramphenicols, tetracyclines, Penicillin derivatives, cephalosporin’s and their derivatives.
  4. The world’s first antibiotic penicillin was discovered by Dr. Alexander Fleming.
  • Analgesics:
  1. Analgesics or pain killers that react like the pain-suppressing chemicals released by the body.
  2. They suppress the feeling of ‘pain.
  3. This analgesics drug selectively relieves pain by acting either in CNS (Central Nerves System) or on peripheral pain mechanism, without significantly altering consciousness.

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