Download App

Human Health and Disease — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Health and Disease3 Marks
Question
When someone buys packets of cigarettes, cannot miss the statutory warning that is present on the packing which warns against smoking and says how it is injurious to health. Yet, smoking is very prevalent in our society, both among young and old. Advise the adolescents about the importance of avoiding smoking. (Mention any six points.)
✓

Answer

  1. Tobacco in cigarettes contains a large number of chemical substances including nicotine, an alkaloid. Nicotine stimulates adrenal gland to release adrenaline and nor-adrenaline into blood circulation, both of which raise blood pressure and increase heart rate.
  2. Smoking is associated with increased incidence of cancers of lung, urinary bladder, throat and oral cavity.
  3. It is responsible for bronchitis and emphysema.
  4. It is associated with increased risk of coronary heart disease, gastric ulcer, etc.
  5. Smoking increases carbon monoxide (CO) content in blood and reduces the concentration of haem-bound oxygen. This causes oxygen deficiency in the body.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Human Health and Disease→Human Health and Disease — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Is pollination and fertilisation necessary in apomixis? Give reasons.
→
At what stage is the mammalian embryo implanted in the uterus?
→
Explain biodiversity loss due to alien species invasions.###Among the reasons of biodiversity loss, how does extinction of indiginous species is carried out by invation of allian species? Explain.
→
How tobacco plant is made pest resistance from nematodes?###Explain RNA interference with example.###Explain: Pest resistance Plants.
→
  1. What is meant by ecological succession? Explain how it occurs.
  2. What properties distinguish a pioneer community from a climax community?
→
What is pregnancy? Write the name of pregnancy maintaining hormone.
→
Give any two reasons why the patent on Basmati should not have gone to an American Company.
→
 Answer the following:
  1. What are IUDs?
  2. List out its types with examples.
  3. How do they prevent conception?
→
List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs:
→
Show with the help of a flow chart only, the life cycle of malerial parasite in humans.
→