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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: - Active transport is characterized by
- Which of the following structures between two adjacent cells forms an effective
- What would be the number of chromosomes of the aleurone cells of a plant with 42
- The difference between male and female cockroach is
- Which among the following has highest water potential
Topics: Human Digestion and Breathing
(167)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Active transport is characterized by
- Which of the following structures between two adjacent cells forms an effective
- What would be the number of chromosomes of the aleurone cells of a plant with 42
- The difference between male and female cockroach is
- Which among the following has highest water potential
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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