Respiratory System Quiz
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Questions and Answers

What happens to the volume inside the chest cavity during inhalation?

  • It fluctuates, causing variable air pressure changes.
  • It decreases, leading to an increase in air pressure.
  • It increases, leading to a decrease in air pressure. (correct)
  • It remains the same, allowing for a steady airflow.

    • Which process occurs when the diaphragm relaxes?

  • Air pressure in the lungs decreases below atmospheric pressure.
  • The chest cavity volume increases, allowing air to rush in.
  • The ribcage falls down and in, decreasing the chest cavity volume. (correct)
  • The alveoli expand to allow more air in.

    • What is the role of alveoli in the respiratory system?

  • To regulate the temperature of the incoming air.
  • To facilitate gas exchange between air and blood. (correct)
  • To create pressure changes that assist in inhalation.
  • To filter impurities from the air before it enters the lungs.

    • How does oxygen move during the gas exchange process?

    <p>From the alveoli into the blood in the capillaries.</p> Signup and view all the answers

    Which statement correctly describes the process of exhalation?

    <p>Air is forced out due to increased pressure in the chest cavity.</p> Signup and view all the answers

    What is the primary purpose of respiration in living organisms?

    <p>To release energy from food</p> Signup and view all the answers

    Which of the following best describes aerobic respiration?

    <p>The release of energy from food using oxygen</p> Signup and view all the answers

    In the process of building cells, what is the role of amino acids?

    <p>They are converted into proteins by cells</p> Signup and view all the answers

    Which structure is responsible for keeping the windpipe open?

    <p>Rings of cartilage</p> Signup and view all the answers

    Why is it better to breathe through the nose rather than the mouth?

    <p>It warms, filters, and moistens the air</p> Signup and view all the answers

    Which side of the heart receives deoxygenated blood from the body?

    <p>Right atrium</p> Signup and view all the answers

    What is the primary reason for the left ventricle being thicker than the right ventricle?

    <p>It has to pump blood throughout the entire body.</p> Signup and view all the answers

    Which function do the valves in the heart serve?

    <p>To prevent backflow of blood.</p> Signup and view all the answers

    Which blood vessel carries oxygenated blood away from the heart?

    <p>Aorta</p> Signup and view all the answers

    During double circulation, how many times does the blood pass through the heart?

    <p>Twice</p> Signup and view all the answers

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