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

Mesothelioma is an aggressive cancer that destroys the membranes of the lungs. Which of the following statements is true regarding mesothelioma?

  1. Incidence of mesothelioma is decreasing as a consequence of the ban on use of asbestos.

  2. It is more common in females.

  3. All deaths due to mesothelioma should be reported to the coroner.

  4. Radical surgery is the best treatment of this disease.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As mesothelioma is often associated to the exposure to asbestos, if a person dies from it then it is the duty of a coroner to find out if the death was due to the deceased being exposed to asbestos in a workplace or in the surroundings.

Multiple choice

The pulmonary trunk originates from ___________.

  1. right auricle

  2. left auricle

  3. right ventricle

  4. left venrticle

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

The pulmonary trunk is a major vessel of the human heart which originates at the right ventricle. It branches into the right and left pulmonary arteries, which carries deoxygenated blood to the lungs.

Multiple choice

Consider the following statements:

  1. In mammals, diaphragm makes a partition between lungs and heart.
  2. A camel has three-chambered stomach.

Which of the given statements is/are incorrect?

  1. Only (1)

  2. Only (2)

  3. Both (1) and (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (1) is incorrect. In mammals, diaphragm makes a partition between thoracic and abdominal cavities. Statement (2) is correct. Yes, a camel has three-chambered stomach to store large amount of water.

Multiple choice

Which of the following organs help earthworm in respiration?

  1. Lungs

  2. Gills

  3. Trachea

  4. Spiracles

  5. Skin
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Earthworms respire through their moist skin, a process called cutaneous respiration. They have no specialized respiratory organs like lungs, gills, or trachea. Oxygen diffuses directly through their skin into their bloodstream, and carbon dioxide diffuses out. This requires their skin to remain moist for gas exchange to occur.

Multiple choice

What are the divisions of trachea which function before it finally passes the air to alveoli?

  1. Trachea- p bronchi- lober bronchi- segmental bronchi- respiratory bronchioles- terminal bronchioles- alveolar ducts- alveolar sacs

  2. Trachea- p bronchi- segmental bronchi- lober bronchi- terminal bronchioles- respiratory bronchioles- alveolar ducts- alveolar sacs

  3. Trachea- p-bronchi-lober bronchi- segmental bronchi- terminal bronchioles- respiratory bronchioles- alveolar ducts- alveolar sacs

  4. Trachea- p bronchi- segmental bronchi- lober bronchi- respiratory bronchioles- terminal bronchioles- alveolar ducts- alveolar sacs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Trachea divides into 2 primary bronchi, which sub-divide into three secondary bronchi.

Multiple choice

Which of the following sentences is incorrect?

  1. The right main bronchus is wider, shorter and more verical than the left main bronchus.

  2. The left main bronchus is shorter than the right one.

  3. Eparterial bronchus is present in the superior lobe of lungs.

  4. The right main bronchus divides into three secondary bronchi.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is incorrect. Left main bronchus is longer than the right one.