Control of respiration Practice Questions
40 free Control of respiration practice questions for the Physiology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
40 questions
All Control of respiration questions
- Q1. Which region of the brainstem is primarily responsible for generating the basic rhythm of respiration?
- Q2. The dorsal respiratory group primarily controls:
- Q3. Which respiratory center limits the duration of inspiration?
- Q4. Central chemoreceptors are primarily sensitive to changes in:
- Q5. Which stimulus is the most powerful driver of ventilation under normal conditions?
- Q6. Peripheral chemoreceptors are located in the:
- Q7. Which condition most strongly stimulates peripheral chemoreceptors?
- Q8. The ventral respiratory group is mainly active during:
- Q9. Which reflex prevents overinflation of the lungs?
- Q10. Voluntary control of respiration is mediated primarily by:
- Q11. Which nerve carries afferent signals from peripheral chemoreceptors to the brainstem?
- Q12. During metabolic acidosis, ventilation increases primarily to:
- Q13. Which factor shifts the respiratory drive to depend more on hypoxia rather than hypercapnia?
- Q14. Which respiratory center is stimulated by carbon dioxide to increase inspiration?
- Q15. The apneustic center primarily has which effect on respiration?
- Q16. Which change would decrease the firing of central chemoreceptors?
- Q17. During exercise, increased ventilation is initially due to:
- Q18. Which condition would most likely depress respiratory centers?
- Q19. Which receptor type responds to lung stretch during normal breathing?
- Q20. Which blood gas change has the least direct effect on central chemoreceptors?
- Q21. Which of the following describes the primary mechanism by which central chemoreceptors are stimulated during a rise in arterial PCO2?
- Q22. The Hering-Breuer inflation reflex is a protective mechanism that limits inspiration. Which pathway and receptor type are responsible for this reflex?
- Q23. At what threshold of arterial PO2 do peripheral chemoreceptors significantly increase their firing rate to drive ventilation?
- Q24. Which cell type in the carotid body acts as the actual oxygen sensor by closing oxygen-sensitive K+ channels during hypoxia?
- Q25. Which respiratory center in the brainstem is responsible for 'switching off' inspiration, thereby regulating the inspiratory volume and respiratory rate?
- Q26. During heavy exercise, ventilation increases almost immediately, often before any changes in arterial blood gases are detected. What is the primary cause of th…
- Q27. Why does a patient with severe carbon monoxide (CO) poisoning often fail to show an increase in ventilation despite critically low oxygen delivery to tissues?
- Q28. Juxtacapillary (J) receptors are located in the alveolar walls near the capillaries. What is their primary stimulus and resulting effect?
- Q29. In a patient with chronic obstructive pulmonary disease (COPD) and long-standing hypercapnia, why is it potentially dangerous to administer high-flow supplemen…
- Q30. The Pre-Bötzinger complex is a crucial component of the respiratory control system. What is its specific role?
- Q31. Which cranial nerve transmits sensory information from the aortic bodies to the brainstem?
- Q32. What is the primary function of the Dorsal Respiratory Group (DRG) during quiet, resting breathing?
- Q33. Peripheral chemoreceptors are the only receptors that respond directly to which of the following stimuli?
- Q34. How does the 'apneustic center' in the lower pons affect the breathing pattern?
- Q35. Which of the following would occur if the brainstem was transected between the pons and the medulla?
- Q36. Which receptor type is responsible for the 'cough reflex' when mucus or dust enters the larger airways?
- Q37. The 'breaking point' of breath-holding is primarily determined by the buildup of which substance?
- Q38. Which area of the brain allows for the conscious, voluntary bypass of the medullary respiratory centers (e.g., when singing or holding one's breath)?
- Q39. During metabolic acidosis, what is the ventilatory response and its physiological purpose?
- Q40. What is the effect of sleep on the CO2 response curve of the respiratory system?