Regulation of respiration, disperse of respiratory system — NEET Biology Questions

Practice 30 questions on Regulation of respiration, disperse of respiratory system from Breathing and Gaseous Exchange (NCERT Class 11, Chapter 14). Free samples below — get all 30 in the app.

30 Questions Breathing and Gaseous Exchange Class 11

Sample Questions — Regulation of respiration, disperse of respiratory system

Try 5 questions below from Regulation of respiration, disperse of respiratory system. Get all 30 in the MedicNEET app.

MCQ
How does asthma affect airflow in the respiratory system?
  • A. It causes smooth muscle relaxation in bronchi
  • B. It strengthens the alveolar walls
  • C. It results in dilation of bronchi
  • D. It leads to swelling and constriction of bronchi
✅ Correct Answer: D
In asthma, inflammation and constriction of the bronchi make breathing difficult, often causing wheezing.
MCQ
What is the main function of the receptors in the aortic arch and carotid artery?
  • A. To monitor heart rate
  • B. To increase oxygen saturation in blood
  • C. To regulate lung elasticity and aid in respiration
  • D. To detect changes in CO₂ and H⁺ concentration
✅ Correct Answer: D
These receptors monitor CO₂ and H⁺ levels and send signals to the brain to adjust respiration accordingly.
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MCQ
Which centre in the brain is responsible for maintaining respiratory rhythm?
  • A. Respiratory rhythm centre
  • B. Pneumotaxic centre
  • C. Chemosensitive area
  • D. Medullary cortex
✅ Correct Answer: A
The respiratory rhythm centre located in the medulla controls the basic rhythm of respiration.
MCQ
Which of the following is NOT part of the respiratory regulation pathway?
  • A. Medullary rhythm centre
  • B. Pons pneumotaxic centre
  • C. Pineal gland
  • D. Chemosensitive area
✅ Correct Answer: C
Pineal gland is unrelated to respiratory control.
MCQ
Why is the role of oxygen in the regulation of respiration considered insignificant compared to CO₂?
  • A. Oxygen is always in excess in the body
  • B. Oxygen does not alter the pH of blood as CO₂ does
  • C. Oxygen does not influence breathing directly
  • D. Oxygen is not necessary for breathing control
✅ Correct Answer: B
CO₂ directly affects blood pH and is the major regulator, unlike oxygen which has minimal direct influence.

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