Biology

Respiration and Gas Exchange

958 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

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.

Multiple choice

Why do mammalian lungs have numerous alveoli?

  1. For increasing volume of inspired air

  2. For keeping the lungs in proper shape and position

  3. For higher number of muscles to provide greater elasticity

  4. For increasing surface area for gaseous diffusion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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Multiple choice

Passive smoking is breathing in smoke from other people's cigarettes, cigars or pipes. Smoke that is breathed out by a smoker is called mainstream smoke. Which of the following is not passive smoking?

  1. A pregnant woman sitting in a room where her husband is smoking.

  2. A group of friends smoking by turns from a common cigarette.

  3. A woman standing in a market-place and inhaling smoke.

  4. A child standing with his grandfather who is smoking.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In this case all the people are smoking directly or actively.

Multiple choice

True/False Inhalation eases you deeper into a posture

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In yoga, exhalation is typically used to move deeper into a posture, as it helps the body release tension and relax into the stretch. Inhalation is generally used to lengthen the spine or prepare for a movement.