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Breathing and Exchange of Gases Test 38

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Breathing and Exchange of Gases Test 38
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  • Question 1
    1 / -0
    Surfactant is?
  • Question 2
    1 / -0
    $$CO_2$$ passes into blood and transported to alveolar site in the form of.
    Solution
    Nearly 20-25 percent of $$CO_2$$ is transported by RBCs whereas 70 percent of it is carried as bicarbonate. About 7 per cent of  $$CO_2$$ is carried in a dissolved state through plasma. 
    Hence the correct answer is (A)
  • Question 3
    1 / -0
    _____ projects obliquely upwards behind the tongue and the hyoid bone, pointing dorsally.
    Solution
      • The epiglottis is a large, leaf-shaped piece of cartilage lying on top of the larynx. It projects obliquely upwards behind the tongue and the hyoid bone, pointing dorsally.
      • During swallowing of food the larynx elevates, causing the epiglottis to fall on the glottis (opening into larynx) like a lid, closing it off, this prevents food from entering the windpipe (trachea). Hence The structure which prevents the entry of food particles into the respiratory passage is Epiglottis.
      • So, the correct answer is 'Epiglottis'.
    • Question 4
      1 / -0
      What is the value of pO$$_2$$ in alveoli and tissues respectively?
      Solution
      • The partial pressure of oxygen in the alveoli of the lungs is approximately 104 mm Hg while within the tissues is 40mm Hg.

      So, the correct answer is option A.
    • Question 5
      1 / -0
      Sometimes RBCs form a pile or stack known as
      Solution
      • Rouleaux (singular is rouleau) are stacks or aggregations of Red blood cells (RBCs) that form because of the unique discoid shape of the cells in vertebrates. 
      • The flat surface of the discoid RBCs gives them a large surface area to make contact with and stick to each other; thus forming a rouleau. 
      • They occur when the plasma protein concentration is high.
      • Therefore, Option C is the correct answer. 
    • Question 6
      1 / -0
      Bronchial respiration occurs with the help of.
    • Question 7
      1 / -0
      Which has more affinity for haemoglobin?
    • Question 8
      1 / -0
      The pneumotoxic and respiratory rhythm centres are respectively present in.
      Solution

    • Question 9
      1 / -0
      How much air is in lungs FRC?
    • Question 10
      1 / -0
      Name the pulmonary disease in which alveolar surface  involved in gas exchange is drastically reduced due to damage in alveolar wall.
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