Respiratory System MCQs with Answers

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The chest cavity is separated from the abdominal cavity by the diaphragm, a dome-shaped muscular sheet that also plays a key role in breathing.

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The respiratory surface must be permeable, thin, have a large surface area, and a good supply of blood for efficient gas exchange.

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The gas released from the body as a waste product during respiration is Carbon Dioxide.

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A respiratory surface must be thin and moist, have a large surface area, and possess a rich blood supply to facilitate efficient gas exchange.

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The primary function of the lungs is respiration, which is the process of exchanging oxygen and carbon dioxide between the body and the environment.

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Lungs eliminate waste product from the body in the form of carbon dioxide.

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Inspiration involves both inhalation of air into the lungs and contraction/flattening of the diaphragm.

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Air pollution chiefly affects the Respiratory system as harmful pollutants enter the body through breathing and damage the lungs and airways.

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The exchange of gases (oxygen and carbon dioxide) in humans and higher animals is carried out by respiratory processes.

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The epiglottis is a leaf-shaped flap of cartilage that covers the larynx during swallowing to prevent food from entering the airway.