Download App

STD 11 - 14. Breathing and exchange in gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 14. Breathing and exchange in gases1 Mark
MCQ
Which of the following match is correct?
  • ✓
    Emphysema: reduction of surface area of alveoli and bronchi
  • B
    Pneumonia: occupational disease with asbestos
  • C
    Silicosis: inflammation of alveoli
  • D
    Asthma: excessive secretion of bronchial mucus
✓

Answer

Correct option: A.
Emphysema: reduction of surface area of alveoli and bronchi
a
Cigarette smoking leads to the disease emphysema. In this disease, terminal bronchioles get obstructed. This reduces the ventilation of the alveoli connected to them. Many alveoli coalesce together to form large chambers due to destruction of their walls. This change of smaller alveoli to large chambers reducing the area of alveolar surface across which gases are exchanged. All these changes reduce both oxygen uptake and carbon dioxide elimination.

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 STD 11 - 14. Breathing and exchange in gases→STD 11 - 14. Breathing and exchange in gases — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Consider the following statements and choose the incorrect option

$a$. Large and more numerous nucleoli are present in cells actively carrying out protein synthesis.

$b$. Nuclear pores allow bidirectional movement of molecules.

$c$. Cytoskeleton is a glycolipid structure for mechanical support, motility and maintenance of the shape of the cell.

$d$. Steroidal hormones are synthesized by Golgi complex.

→
Scientific name of wheat.
→
Casting off of old skeleton during growth of an animal is
→
Cyclosis is
→
$A$ : True coelom originated for the first time in phylum Annelida.

$R$ : It allowed the animal to have an alimentary canal longer than the body & space for storing gametes.

→
The muscles associated with the heart of insects are:
→
In non-cyclic photophosphorylation
→
The main difference in Gram $(+) \ ve$ and Gram $(-) \ ve$ bacteria resides in their:
→
It is not part of epidermal tissue system in plants
→
A student was given a sample of tissue. He observes and concludes the following characters.

($i$) The cells are composed of a single layer of tall and slender cells.

($ii$) Their nuclei are located at the base.

($iii$) Free surface may have microvilli.

($iv$) It is found in the lining of stomach and intestine

($v$) They help in secretion and absorption. Based on the above features identify the epithelium.

→