Breathing and Exchange of Gases Questions
2,3-BPG function:
Which of the following correctly defines FEV₁/FVC ratio?
In emphysema, which of the following structural changes occurs in the lungs?
Total lung capacity (TLC) is equal to:
Bohr's effect explains:
The enzyme carbonic anhydrase is found primarily in:
During forced expiration, which muscles contract actively?
In which part of the brain is the pneumotaxic centre located?
The partial pressure of O₂ in the alveolar air is approximately:
Surfactant in the lungs is secreted by which cells?
Which of the following lung volumes CANNOT be measured directly by a spirometer?
The chloride shift (Hamburger phenomenon) occurs because:
What percentage of CO₂ is transported as bicarbonate ions (HCO₃⁻) in the blood?
Which muscle is the primary muscle of respiration?
The vital capacity of the lungs is defined as:
Inspiration (inhalation) occurs when:
Haemoglobin combines with oxygen to form:
Which of the following is a feature of the alveolar membrane that facilitates rapid gas exchange?
The respiratory centre that controls normal breathing rhythm is located in the:
Which gas is the primary driver for the urge to breathe in humans?
The normal tidal volume in a healthy adult is approximately:
What is the site of actual gas exchange in the lungs?
Which of the following is the correct order of the respiratory tract in humans?