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
  1. legionellosis

  2. peptic ulcer

  3. bronchitis

  4. pneumonia

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bronchitis is inflammation of the mucous membranes of the bronchi, the airways that carry airflow from the trachea into the lungs. Bronchitis can be divided into two categories, acute and chronic, each of which has unique etiologies, pathologies, and therapies.

Multiple choice
  1. respire

  2. Release wastes

  3. Sweat

  4. None of the above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The anus is the opening at the end of the digestive tract through which solid waste is eliminated from the body.

Multiple choice
  1. propagative roots

  2. haustorial roots

  3. pneumatophores

  4. stranglers

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

These specialized aerial roots enable plants to breathe air in habitats that have waterlogged soil. The roots may grow down from the stem, or up from typical roots.

Multiple choice
  1. Combustion

  2. Respiration

  3. Formation of oxides

  4. Photosynthesis

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photosynthesis produces oxygen as a byproduct, it does not consume it. Combustion and respiration both use oxygen to produce energy, while oxide formation involves oxygen reacting with other elements.

Multiple choice
  1. Nitrogen

  2. Carbon dioxide

  3. Oxygen

  4. Hydrogen

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxygen is consumed during cellular respiration as the final electron acceptor in the electron transport chain, producing water and ATP. During photosynthesis, oxygen is released as a byproduct when water molecules are split to provide electrons for the light-dependent reactions. This reciprocal relationship sustains atmospheric oxygen levels.

Multiple choice
  1. He will breathe in more oxygen.

  2. Harmful dust particles will also enter.

  3. Saliva will not let harmful particles enter.

  4. Teeth will not let enough oxygen enter.

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, harmful dust particles may enter his body. Fine hair and mucus are present inside the nose to prevent dust particles from getting into the respiratory system.

Multiple choice
  1. Lungs

  2. Respiratory tract

  3. Heart

  4. Liver

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Asthma primarily affects the respiratory tract, causing bronchial tube inflammation, constriction, and mucus production that makes breathing difficult. While lungs contain the affected airways, 'respiratory tract' more precisely describes the system impacted. Asthma doesn't directly affect heart or liver function.

Multiple choice
  1. hypoxia

  2. hyperventilation

  3. Both 1 and 2

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Breathing into a paper bag helps treat hyperventilation by re-inhaling carbon dioxide. Hyperventilation causes excessive CO2 expulsion, leading to respiratory alkalosis. The paper bag technique increases CO2 levels in the bloodstream, restoring acid-base balance. It does not treat hypoxia, which requires oxygen supplementation.

Multiple choice
  1. Becaus fFine hair and mucus present inside the nose prevent dust particles from getting into the respiratory system.

  2. Becaus we loose more water during expiration when we use our nose for breathing.

  3. Because our nose purifies the oxygen and the mouth does not purify oxygen.

  4. Because we can breathe more from our nose because of the shorter pathway of air and larger diameter as compared to the mouth.

  5. None of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. Fine hair and muscus do not allow the harmful dust particles from getting inside our respiratory system.