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Respiration in Organisms Test - 9

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Respiration in Organisms Test - 9
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  • Question 1
    1 / -0
    Ribs move upward and outward during ________.
    Solution
    • During inhalation, the ribs move upward and outward which increases the volume of the chest cavity.
    • During exhalation, the ribs move downward and inward to decrease the volume of the chest cavity.
    So, the correct answer is option A.
  • Question 2
    1 / -0
    Which gas is more in exhaled air than in inhaled air?
    Solution
      • The reason we breathe is to get oxygen into our bodies to allow for respiration. From the above given table you can interpret that: 
      • The amount of inhaled air contains 21% of oxygen and 0.04% of carbon dioxide, while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide and the percentage of nitrogen stays at nearly 79% ( as we do not have any use for nitrogen).
      •  This is because during the process of respiration our cells use oxygen from the inhaled air to release energy and give out carbon dioxide as a byproduct.

    • Question 3
      1 / -0
      The act of taking in air into the body through nostrils is called ______.
      Solution
      • The act of taking in air into the body through nostrils is called inhalation. By this process, fresh air enters the lungs that contain a large amount of oxygen.
      • Exhalation is when we give out air rich in carbon dioxide. 
      • Ingestion is the process of taking in food through the mouth.
      • Absorption is defined as the process when one thing becomes part of another thing.
      So, the correct answer is option B.
    • Question 4
      1 / -0
      During strenuous exercise, glucose is converted into:
      Solution
      When we perform strenuous exercise, we begin to breathe faster and our body demands oxygen at a rate faster than usual due to increased energy demand. In such cases, the working muscles generate energy anaerobically. Thus, when oxygen is limited, the body converts glucose into lactic acid, to continue energy production.
      Hence, the correct option is D.
    • Question 5
      1 / -0
      Rita breathes out on a mirror and finds water droplets on it. This activity helps to conclude the fact that
      Solution
      • Carbon dioxide is released in the process of exhalation in a large amount. 
      • When it is released, it is saturated with water vapour and this is the reason for water droplets in the mirror.
      So the correct answer is 'water vapour is released during breathing'.
    • Question 6
      1 / -0
      The product obtained in the anaerobic respiration in yeast is:
      Solution
      The anaerobic respiration carried out by yeast is the breakdown of Glucose in the absence of Oxygen. The Glucose is broken down to produce alcohol and Carbon dioxide.
      Hence the correct option is C.
    • Question 7
      1 / -0
      Which of the following situations is likely to cause muscle cramps ?
      Solution
      During heavy exercise, there is a shortage of oxygen. In such a case, the muscles undergo anaerobic mode of respiration. In this type of anaerobic respiration, due to less oxygen being available, glucose is converted to lactic acid and energy. This lactic acid gets accumulated in the muscles and leads to muscle cramps.
      Thus, the correct answer is option A.
    • Question 8
      1 / -0
      Where do plant roots take up oxygen from?
      Solution
      • The plant's roots are embedded into the soil. 
      • The soil has air spaces that allow the tip of the roots to take up oxygen and then this is used by the cells of the root for respiration.
      So the correct answer is 'Air spaces between the soil'.
    • Question 9
      1 / -0
      The small openings on the side of cockroach body are called as
      Solution
      Spiracle is an external respiratory opening present on the side of cockroach's body. It has series of holes through which air passes directly through the body into a system of branching tubes.
      So, the correct answer is 'Spiracles'.
    • Question 10
      1 / -0
      Which component of air is exhaled by the body?
      Solution
      Carbon dioxide is a waste product of the body. It is majorly exhaled out by the body so that it will reduce the competition to gets bind to the haemoglobin with oxygen. It is saturated with water vapours.
      So the correct answer is 'Carbon dioxide'.
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