Download App

Human Health and Disease — BIOLOGY STD 12 Science — Question

Rajasthan 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→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Define Lactation.
→
Differentiate between an annual and a biennial plant. Provide one example of each.
→
Explain divergent evolution in detail. What is the driving force behind it?
→
Indiscriminate human activities such as alien species invasion, fragmentation and habitat loss have accelerated the loss of biodiversity. Justify by taking one example for each.
→
Some parents wrote a complaint letter to the local municipality to remove all the hoardings in the city, advertising the use of condoms and matters relating to AIDS prevention. The children of these parents came to know about the matter and raised their voice against removal of the hoardings. The parents were convinced by the awareness level of their children and withdrew the complaint.
  1. Parents considered the hoarding as inappropriate. Do you agree/ disagree with their view?
  2. What are the methods by which AIDS spreads?
  3. What is AIDS?
  4. What values are promoted by the children protesting against their parents?
→
Distinguish between gross primary productivity and net primary productivity.
→
Recently a girl baby has been reported to suffer from haemophilia. How is it possible? Explain with the help of a cross.
→
  1. Identify (A) and (B) illustrations in the following:
  1.  

  1.  

  1. Write the term given to (A) and (C) and why?
  2. Expand PCR. Mention its importance in biotechnology.
→
A person is born with a hereditary disease with a weakened immune system due to deficiency of an enzyme. Suggest a technique for complete cure for this disease, identify the deficient enzyme and explain the technique used for cure.
→
If origin of life is in progress in any other planet, what would be the condition there?
→