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Respiration in ...

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  • Question 1
    1 / -0

    The following table enlists the differences between breathing and respiration. Which of the following differences are incorrect?
     

    Breathing Respiration
    (i) It is a physical process. It is a chemical process.
    (ii) It is simply the exchange of gases. It is the burning of food in the presence of O2 and gives out CO2.
    (iii) It occurs at the cellular level. It occurs at the organ level.
    (iv) It is called internal respiration. It is called external respiration.
    (v) It occurs in animals only. It occurs in all living beings including plants.

  • Question 2
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    Why is aerobic respiration more advantageous than anaerobic respiration?

  • Question 3
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    During the process of inhalation, changes occur in the diaphragm and rib cage. Which of the following is the correct match?
     

    Diaphragm Rib cage
    1. Flattens
    2. Contracts
    3. Becomes more curved
    4. Becomes more curved    		 Moves down and inwards
    Moves outwards and upwards
    Moves down and inwards
    Moves down and upwards

  • Question 4
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    Two words related in some way are given and the third word is also given followed by four alternatives. You have to find out which one of the alternatives bears the same relation to the third word as the first and second words do.

    Humans : Nostrils : : Whales : _________

  • Question 5
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    What will happen to the breathing rate if the CO2 concentration in the blood increases?

  • Question 6
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    What causes an asthma attack?

  • Question 7
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    Read the paragraph given below regarding respiration in plants. A few words have been underlined.

    Mostly, plants undergo anaerobic respiration. They exchange gases through stomata by osmosis. At night, no photosynthesis occurs; CO2 is eliminated out through stomata. During the day, CO2 is used for photosynthesis; hence, there is intake of CO2 and release of O2 through stomata.

    Select the correct option regarding this.

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