Biology

Respiration and Gas Exchange

989 Questions

Access a targeted set of questions on respiration and gas exchange for competitive exams. Topics include lung volumes, the mechanism of breathing, and respiratory anatomy. Understanding these physiological processes is essential for scoring well.

Lung volumes and capacitiesBreathing mechanismsRespiratory anatomyGas exchange processes

Respiration and Gas Exchange Questions

Multiple choice

How is respiration accomplished in arthropods?

  1. By lungs and gills

  2. By book lungs and tracheae

  3. By lungs and tracheae

  4. By book lungs, tracheae and gills
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Respiration is accomplished in arthropods by book lungs, tracheae and gills.

Multiple choice

In normal expiration, the diaphragm is

  1. Arched

  2. Flattened

  3. Perforated

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During inhalation, the diaphragm contracts, thus enlarging the thoracic cavity (the external intercostal muscles also participate in this enlargement). This reduces intra-thoracic pressure: in other words, enlarging the cavity creates suction that draws air into the lungs.

Multiple choice

After deep inspiration, capacity of maximum expiration of lungs is called

  1. total lung capacity

  2. functional residual capacity

  3. vital capacity

  4. inspiratory capacity

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vital capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume and expiratory reserve volume.