HUMAN PHYSIOLOGY
BREATHING AND RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Inspiratory center
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Expiratory center
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Either A or B
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None of the above
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Detailed explanation-1: -A rise in carbon dioxide or a decline in oxygen levels in the blood stimulates an increase in respiratory rate and depth.
Detailed explanation-2: -The respiratory center is located in the medulla oblongata and is involved in the minute-to-minute control of breathing.
Detailed explanation-3: -The apneustic center, which is located in the lower pons, is thought to excite the inspiratory center. Rather than abruptly sending signals to the inspiratory muscles to contract, stimulation of the apneustic center leads to a gradual increase in the firing rate of the inspiratory muscles.
Detailed explanation-4: -The pneumotaxic center controls both the rate and the pattern of breathing. The pneumotaxic center is considered an antagonist to the apneustic center, (which produces abnormal breathing during inhalation) cyclically inhibiting inhalation.