7th Class Science Respiration in Organisms Question Bank Respiration In Plants And Animals

  • question_answer
    During increased physical activity

    A) the rate of breathing increases and becomes up to 25 breaths per minute

    B) the rate of breathing decreases and becomes up to 25 breaths per minute

    C) the rate of breath remains unchanged and is the same as that at the time of rest

    D) none of these

    Correct Answer: A

    Solution :

    The normal rate is 15-18 breaths per minute.


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