Download App

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

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ
Expiration is the process of:
  • A
    Taking air in
  • B
    Inhalation
  • C
    Releasing CO2​
  • D
    Giving air out
✓

Answer

  1. Giving air out

Explanation:

During expiration, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases. As a result, the lungs contract and air is forced out. 

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→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

During cell division, the spindle fibres attach to the chromosome at a region called:
→
Plant body of Riccia is
→
Macromolecule chitin is
→
Which of the following is the most abundant protein in the animals$?$
→
Bowman's capsule and glomerulus together constitute
→
The branches of the nodal tissue, which give rise to minute fibres throughout the ventricular musculature of the respective sides are called
→
In bird and mammals, the oxygenated blood received by ...$A$... and deoxygenated blood receive by ...$B$.... The ventricles pump in out without any mixing up of oxygenated and deoxygenated blood

Choose the correct option for $A$ and $B$

→
Muscular dystrophy in humans is a
→
Uric acid is nitrogenous waste in:
→
Which of the following groups consists only of polysaccharides?
→