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When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
Options
(a) rising CO2 concentration
(b) falling CO2 concentration
(c) rising CO2 and falling O2 concentration
(d) falling O2 concentration
Correct Answer:
rising CO2 concentration
Explanation:
Chemorecepters in the medulla get stimulated by increase in CO₂ concentration in the blood of arteries. Decrease in O₂ concentration has no significatant effect on chemoreceptors.
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- Connection of bone to bone is by
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Topics: Human Digestion and Breathing
(167)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The disease due to which maximum death is children occur is
- Connection of bone to bone is by
- The main difference in white and yellow fibres is of
- Which one of the following is an antifungal antibiotic
- When one element is involved in opening and closing of stomata the other helps
Topics: Human Digestion and Breathing (167)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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