The best stimulator of respiratory center is____________?
Correct answer: D. Increase in arterial carbon dioxide level
- A. Decrease in arterial carbon dioxide level
- B. None of the above
- C. Increase in arterial oxygen level
- D. Increase in arterial carbon dioxide level
Explanation
An increase in arterial CO₂ raises hydrogen ion concentration in brain extracellular fluid and strongly stimulates the medullary respiratory centres. Low CO₂ and high O₂ do not provide the normal primary drive to ventilation.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Respiratory Physiology
46 free Respiratory Physiology MCQs from Physiology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physiology questions like this
Physiology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Respiratory Physiology questions
During the initial part of inspiration, which of the following does not occur ?
Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?
Limitation of inspiration by vagal lung inflation signals is called the______________?
Oxygen dissociation curve shifts to the right by all of the following except_____________?
The major sign of hypoventilations_____________?
During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________?