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
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legionellosis
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peptic ulcer
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bronchitis
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pneumonia
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.
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respire
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Release wastes
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Sweat
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None of the above
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.
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propagative roots
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haustorial roots
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pneumatophores
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stranglers
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.
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larynx
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bronchi
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trachea
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pharynx
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alveoli
E
Correct answer
Explanation
This is the correct answer. The gaseous exchange in human respiratory system takes place in the alveoli.
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a only
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b only
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c only
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a and c
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b and c
B
Correct answer
Explanation
This is the correct answer as this statement is incorrect. Rate of breathing is controlled by the respiration system of the brain.
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Isobenzofuran
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Borneol
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Isoflurane
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Isoindole
C
Correct answer
Explanation
Isoflurane is a halogenated ether used for inhalational anaesthesia. Together with enflurane and halothane, it replaced the flammable ethers used in the pioneer days of surgery.
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Combustion
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Respiration
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Formation of oxides
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Photosynthesis
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.
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Nitrogen
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Carbon dioxide
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Oxygen
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Hydrogen
B
Correct answer
Explanation
Photosynthesis uses carbon dioxide as a reactant to produce glucose and oxygen. Respiration does the opposite - it releases carbon dioxide as a waste product when breaking down glucose for energy.
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Nitrogen
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Carbon dioxide
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Oxygen
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Hydrogen
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.
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He will breathe in more oxygen.
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Harmful dust particles will also enter.
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Saliva will not let harmful particles enter.
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Teeth will not let enough oxygen enter.
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None of these
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.
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Lungs
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Respiratory tract
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Heart
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Liver
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.
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hypoxia
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hyperventilation
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Both 1 and 2
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None of these
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.
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Transpiration
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Photo Synthesis
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Percolation
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Respiration
B
Correct answer
Explanation
Green plants perform photosynthesis, which uses sunlight, carbon dioxide, and water to produce glucose and oxygen. This distinguishes them from animals that primarily perform respiration.
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Carbon dioxide and oxygen
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Oxygen and carbon dioxide
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Carbon dioxide and nitrogen
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Nitrogen and oxygen
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Argon and nitrogen
A
Correct answer
Explanation
This is the correct option. During photosynthesis, carbon dioxide is consumed and oxygen is released by plants.
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Becaus fFine hair and mucus present inside the nose prevent dust particles from getting into the respiratory system.
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Becaus we loose more water during expiration when we use our nose for breathing.
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Because our nose purifies the oxygen and the mouth does not purify oxygen.
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Because we can breathe more from our nose because of the shorter pathway of air and larger diameter as compared to the mouth.
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None of the above
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.