Human Respiratory System Overview
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Questions and Answers

What is the function of intercostal muscles in the respiratory system?

  • To separate the heart and lungs
  • To make air rush in through the mouth and nose
  • To help with gas exchange in the alveoli
  • To control the expansion and contraction of the lungs (correct)

    • How do ribs contribute to breathing?

  • By helping to carry oxygenated blood
  • By separating the heart and lungs
  • By contracting to pull the ribs up and out (correct)
  • By exchanging gases in the alveoli

    • What happens when the diaphragm muscle contracts?

  • Air rushes in through the mouth and nose (correct)
  • Ribs move up and blood cells arrive at capillaries
  • The chest gets smaller and air flows out
  • Oxygen binds to red blood cells

    • What is the function of the trachea in the respiratory system?

    <p>Transporting air from the nose and mouth to the lungs</p> Signup and view all the answers

    Where are the alveoli located in relation to the bronchioles?

    <p>At the end of each bronchiole</p> Signup and view all the answers

    How does gas exchange occur inside the alveoli?

    <p>By diffusion between the walls of capillaries and the air in alveoli</p> Signup and view all the answers

    What is the main purpose of alveoli in the respiratory system?

    <p>To exchange gases with blood through diffusion</p> Signup and view all the answers

    How are alveoli designed to facilitate gas exchange efficiently?

    <p>By being moist and close together</p> Signup and view all the answers

    What happens at the end of each bronchiole in the respiratory system?

    <p>A cluster of alveoli is present</p> Signup and view all the answers

    Why do lungs have millions of bronchioles and alveoli?

    <p>To allow for efficient exchange of oxygen and carbon dioxide</p> Signup and view all the answers

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