| ⇦ | 
| ⇨ |
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: - A sarcomere in the myofibrils of muscle is found in between
- The number of mitotic cell division required to produce 256 cells from single cell
- Which of the following regions of our country are known for their rich biodiversity?
- During DNA replication, the term leading strand is applied to the one which replicates
- Earthworms have no skeleton but during burrowing the anterior end becomes
Topics: Human Digestion and Breathing
(167)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A sarcomere in the myofibrils of muscle is found in between
- The number of mitotic cell division required to produce 256 cells from single cell
- Which of the following regions of our country are known for their rich biodiversity?
- During DNA replication, the term leading strand is applied to the one which replicates
- Earthworms have no skeleton but during burrowing the anterior end becomes
Topics: Human Digestion and Breathing (167)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply