Self Studies

Breathing and E...

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  • Question 1
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    The natural voices of men, women and children are different and can be distinguished. A student makes three hypotheses
    I. The amplitudes of sounds emitted by them are different.
    II. The vocal cords are of different sizes.
    III. The vocal cords vibrate with different frequencies.
    The correct option is

  • Question 2
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    In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

  • Question 3
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    In respiration, air passes through

  • Question 4
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    The only organ which helps frog during respiration while hibernating is 

  • Question 5
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    Ring of ____ present in trachea, bronchi and bronchioles prevent their collapse when air is not passing through them.

  • Question 6
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    The form of energy used in the process of respiration is:

  • Question 7
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    Lungs lie in the thoracic cavity separated by .......... from the abdominal cavity.

  • Question 8
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    Haemocyanin pigment is characteristic of

  • Question 9
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    During inspiration, muscles of diaphgram

  • Question 10
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     Which of the following is true for respiration?

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