Download App

Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ
Emphysema developes mainly because of:
  • A
    Cigarette smoking.
  • ✓
    Spasm of the smooth muscles of bronchioles.
  • C
    Inflammation of the alveoli.
  • D
    Allergy or hypersensitisation.
✓

Answer

Correct option: B.
Spasm of the smooth muscles of bronchioles.

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 "M.C.Q (1 Marks)" from Breathing and Exchange of Gases→Breathing and Exchange of Gases — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Monocarpic plants are those which:
→
How is uric acid produced in humans?
→
The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is:
→
It is not accessory pigment.
→
Carolus Linnaeus is the father of taxonomy because of one of his contributions
→
In some viruses, $RNA$ is present instead of $DNA$ indicating that
→
Urethra, vagina and oesophagus have a common inner lining of
→
Chromosome start separating at which stage of mitosis
→
Which of the following is not the feature of gymnosperms
→
Several genera resembling one another in their major anatomical and reproductive characters are placed together in:
→