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Breathing and Exchange of Gases Test 32

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Breathing and Exchange of Gases Test 32
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  • Question 1
    1 / -0
    Reduction in respiratory surface of the lungs due to break down of partition in the alveoli is known as.
    Solution
    Emphysema destroys the walls of the alveoli of the lungs, resulting in a loss of surface area available for the exchange of oxygen and carbon dioxide during breathing. Hence, Option D is correct.
  • Question 2
    1 / -0
    End products of aerobic respiration are
    Solution
    Aerobic respiration is the complete oxidation of sugars in presence of oxygen.
    The carbohydrates are broken down into CO₂ and H₂O and this releases energy. This energy is stored in the form of ATP and later used in the body.
    So, the correct option is 'Carbon dioxide, water, and energy'
  • Question 3
    1 / -0
    Aerobic respiration occurs in 
    Solution
    Aerobic respiration is a two step process. First, glycolysis takes place in the cytoplasm of the cell where glucose breaks down to form pyruvate. Then, pyruvate further breaks down into carbon dioxide, water and energy, which occurs in the mitochondria.
    Thus, option D is correct.

  • Question 4
    1 / -0
    Oxygen haemoglobin dissociation curve will shift to right on decrease of.
    Solution
    • The oxygen haemoglobin dissociation curve is shifted either to right or left by various factors.
    • The oxyhaemoglobin curve is shifted to the right  when there is high P$$CO_2$$, low P$$O_2$$, high H+ concentration (low pH) and high temperature. Hence, Option D is correct.
  • Question 5
    1 / -0
    One reason for emphysema is?
    Solution
    The cause of emphysema is usually long-term exposure to irritants that damage the lungs and  airways. This results in breakdown of alveolar walls resulting in large spaces, that impair exchange of gases and cause breathlessness. This may occur due to  Smoking. Hence, Option B is correct.
  • Question 6
    1 / -0
    Pleura is double membrane sac which
    Solution
    • There are two thin layers of tissue that protect and cushion the lungs and known as pleura.
    • The visceral pleura is the inner layer that is stuck so tightly to the lungs that it cannot be peeled off. 
    • The parietal pleura is the outer layer that lines the inside of the chest wall.
    • The thin space between the two pleural layers is known as the pleural cavity and normally contains a small amount of pleural fluid.

    So, the correct answer is option C.
  • Question 7
    1 / -0
    Tidal volume in human beings is?
  • Question 8
    1 / -0
    Lungs have a large number of narrow tubes called.
    Solution
    From the larynx, air moves into lower respiratory tract, starting with the trachea and down to the intersection that branches to form the right and left primary (main) bronchi. Each of these bronchi branch into secondary (lobar) bronchi that branch into tertiary (segmental) bronchi that branch into smaller narrow tube airways called bronchioles that eventually connect with tiny specialized structures called alveoli that function in gas exchange.
    So, the correct option is 'Bronchioles'.
  • Question 9
    1 / -0
    Body tissues obtain oxygen from hemoglobin because of its dissociation in tissues caused by?
  • Question 10
    1 / -0
    The amount of air that moves in and out of the lungs, with each normal inspiration and expiration is called.
    Solution
    During normal breathing, the volume of air inspired or expired is known as Tidal volume.  Its value is approximately 500 ml. Hence, Option C is correct.
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