Gr 9 NATURAL SCIENCES: CH 1.4 Gaseous exchange in the lungs
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Questions and Answers

What is the function of the alveoli in the lungs?

  • To facilitate the exchange of gases (correct)
  • To store oxygen
  • To produce carbon dioxide
  • To distribute air throughout the lungs

    • What is the main factor that allows for efficient diffusion of gases between the alveoli and the blood?

  • The high concentration of oxygen in the blood
  • The low concentration of carbon dioxide in the alveoli
  • The close association of alveoli and capillaries (correct)
  • The large surface area of the bronchi

    • What is the process of diffusion in the lungs?

  • The exchange of gases between the alveoli and the bronchi
  • The movement of particles from an area of high concentration to an area of low concentration (correct)
  • The transport of oxygen from the lungs to the body
  • The movement of particles from an area of low concentration to an area of high concentration

    • What happens to oxygen during inhalation in the lungs?

    <p>It is diffused from the alveoli into the blood</p> Signup and view all the answers

    What is the purpose of the bronchi and bronchioles in the lungs?

    <p>To distribute air throughout the lungs</p> Signup and view all the answers

    What happens to carbon dioxide during exhalation in the lungs?

    <p>It is diffused from the blood into the alveoli</p> Signup and view all the answers

    What is the main advantage of having a large surface area in alveoli?

    <p>To facilitate the diffusion of gases</p> Signup and view all the answers

    What is the function of haemoglobin in red blood cells during gaseous exchange?

    <p>To bind to oxygen, forming oxyhaemoglobin</p> Signup and view all the answers

    What is the characteristic of the walls of the alveoli?

    <p>They are one cell thick</p> Signup and view all the answers

    What is the result of efficient gaseous exchange?

    <p>The maintenance of homeostasis in the body</p> Signup and view all the answers

    What is a consequence of damage to alveoli?

    <p>A decrease in the surface area for gas exchange</p> Signup and view all the answers

    What is the term for the narrowing of airways, impeding airflow to the alveoli?

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

    Where does oxygen from the air diffuse into during gaseous exchange?

    <p>The red blood cells in the capillaries</p> Signup and view all the answers

    What is the term for the infection leading to fluid-filled alveoli, impairing gas exchange?

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

    Why is it essential to maintain efficient gaseous exchange?

    <p>To ensure the delivery of oxygen to cells and the removal of carbon dioxide</p> Signup and view all the answers

    What is the primary function of the moist surfaces of alveoli?

    <p>To help gases dissolve and diffuse more rapidly</p> Signup and view all the answers

    What is the significance of the rich blood supply surrounding the alveoli?

    <p>To ensure a constant supply of blood for gas exchange</p> Signup and view all the answers

    What is the primary consequence of asthma on gaseous exchange?

    <p>Impeded airflow to the alveoli</p> Signup and view all the answers

    What is the primary role of oxyhaemoglobin in the gaseous exchange process?

    <p>To transport oxygen from the lungs to the body cells</p> Signup and view all the answers

    What is the primary cause of impaired gaseous exchange in emphysema?

    <p>Damage to the alveoli, reducing the surface area for gas exchange</p> Signup and view all the answers

    What is the significance of efficient gaseous exchange for the body?

    <p>To ensure the continuous supply of oxygen to body cells and removal of carbon dioxide</p> Signup and view all the answers

    What is the term for the process by which oxygen is taken up and carbon dioxide is removed during gaseous exchange?

    <p>Gaseous exchange</p> Signup and view all the answers

    What is the primary effect of pneumonia on gaseous exchange?

    <p>Impaired gas exchange due to fluid-filled alveoli</p> Signup and view all the answers

    What is the shape of the clusters of air sacs that provide a large surface area for gaseous exchange?

    <p>Grape-like</p> Signup and view all the answers

    During which process does oxygen diffuse from the alveoli into the blood?

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

    What is the direction of movement of particles during diffusion in the lungs?

    <p>From high concentration to low concentration</p> Signup and view all the answers

    What is the result of the diffusion of carbon dioxide during exhalation?

    <p>Carbon dioxide is expelled during exhalation</p> Signup and view all the answers

    What is the purpose of the dense network of capillaries surrounding the alveoli?

    <p>To facilitate efficient diffusion of gases</p> Signup and view all the answers

    What is the term for the movement of oxygen from an area of high concentration to an area of low concentration during inhalation?

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

    What is the characteristic of the lungs that allows them to adapt to their function of gaseous exchange?

    <p>They are soft, pink, and spongy</p> Signup and view all the answers

    What is the primary reason for the adaptability of the lungs to optimize gaseous exchange?

    <p>Increase in surface area for diffusion</p> Signup and view all the answers

    What is the effect of the thin walls of the alveoli on the diffusion of gases?

    <p>It allows for rapid diffusion of gases</p> Signup and view all the answers

    During which stage of the breathing process is the concentration of oxygen higher in the alveoli than in the blood?

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

    What is the direction of movement of carbon dioxide during exhalation?

    <p>From the blood to the alveoli</p> Signup and view all the answers

    What is the significance of the bronchi and bronchioles in the lungs?

    <p>They distribute air throughout the lungs</p> Signup and view all the answers

    What is the primary function of the alveoli in the lungs?

    <p>To facilitate the exchange of gases</p> Signup and view all the answers

    What is the relationship between the concentration of oxygen in the alveoli and the blood during inhalation?

    <p>The concentration of oxygen is lower in the blood</p> Signup and view all the answers

    Which of the following is a consequence of having a large surface area in the alveoli?

    <p>Increased diffusion of oxygen into the blood</p> Signup and view all the answers

    What is the primary role of the capillaries surrounding the alveoli?

    <p>To facilitate the exchange of gases between the alveoli and the blood</p> Signup and view all the answers

    What is the primary effect of pneumonia on gaseous exchange?

    <p>Impaired diffusion of gases due to fluid-filled alveoli</p> Signup and view all the answers

    What is the primary function of oxyhaemoglobin in the gaseous exchange process?

    <p>To bind to oxygen in the alveoli and transport it to the body cells</p> Signup and view all the answers

    What is the primary consequence of emphysema on gaseous exchange?

    <p>Reduced surface area for gas exchange due to damaged alveoli</p> Signup and view all the answers

    What is the primary role of the moist surfaces of the alveoli?

    <p>To help dissolve and diffuse gases more rapidly</p> Signup and view all the answers

    What is the primary consequence of asthma on gaseous exchange?

    <p>Impaired airflow to the alveoli due to inflammation and narrowing of airways</p> Signup and view all the answers

    What is the primary significance of efficient gaseous exchange for the body?

    <p>To ensure a continuous supply of oxygen to body cells and removal of carbon dioxide</p> Signup and view all the answers

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