PATHOLOGY MCQ
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is the most important stimulus to control the respiratory rate?
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chemical factors
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emotional factors
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physical factors
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conscious control
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Explanation:
Detailed explanation-1: -Normally, an increased concentration of carbon dioxide is the strongest stimulus to breathe more deeply and more frequently.
Detailed explanation-2: -The major factor that stimulates the medulla oblongata and pons to produce respiration is surprisingly not oxygen concentration, but rather the concentration of carbon dioxide in the blood.
Detailed explanation-3: -Carbon dioxide is one of the most powerful stimulants of breathing. As the partial pressure of carbon dioxide in arterial blood rises, ventilation increases nearly linearly.
There is 1 question to complete.