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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.
Related Questions: - 3-phosphoglyceric acid (PGA) as the first CO₂ fixation product in algal
- Which one of the following can be used as a bioweapon?
- Which of the following kinds of animals are triploblatic
- In respiration more than one RQ value results from the use of
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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
- 3-phosphoglyceric acid (PGA) as the first CO₂ fixation product in algal
- Which one of the following can be used as a bioweapon?
- Which of the following kinds of animals are triploblatic
- In respiration more than one RQ value results from the use of
- An artificial pacemaker is implanted subcutaneously and connected to the heart
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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