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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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- Pellagra is caused due to the deficiency of which vitamin
- Roots develped from parts of the plant other than radicle are called
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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
- Dinosaurs dominated the world in which of the following geological era?
- Pellagra is caused due to the deficiency of which vitamin
- Roots develped from parts of the plant other than radicle are called
- Gibberellins can promote seed germination because of their influence on
- The taxonomic unit phylum in the classification of animals is equivalent to
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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