The Mechanism of Ventilation and Breathing Measurements (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why is ventilation essential for gas exchange in the alveoli?
Why is ventilation essential for gas exchange in the alveoli?
It maintains concentration gradients
What is the relationship between volume and pressure during breathing?
What is the relationship between volume and pressure during breathing?
Inverse: volume increases, pressure falls
What happens to the diaphragm during inspiration?
What happens to the diaphragm during inspiration?
Contracts and flattens, moving downward
Is inspiration an active or passive process?
Is inspiration an active or passive process?
Active - requires muscle contraction
What type of process is normal expiration at rest?
What type of process is normal expiration at rest?
Passive - muscles relax, lungs recoil
What is vital capacity?
What is vital capacity?
Max volume breathed in/out in one breath
What is tidal volume?
What is tidal volume?
Volume breathed during quiet breathing
Which volume can a spirometer NOT measure?
Which volume can a spirometer NOT measure?
Residual volume
Why does a spirometer trace slope downward from left to right?
Why does a spirometer trace slope downward from left to right?
Subject uses O₂ but CO₂ is removed
What role do stretch receptors play in breathing control?
What role do stretch receptors play in breathing control?
Signal brain to stop inspiration via feedback