Gas Exchange System Tissues and Components (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What is the primary function of cartilage in the respiratory system?
What is the primary function of cartilage in the respiratory system?
Prevents collapse of large airways
In which direction does the mucociliary escalator move mucus?
In which direction does the mucociliary escalator move mucus?
Upward toward the top of the trachea
What is the distinctive structural feature of goblet cells?
What is the distinctive structural feature of goblet cells?
Wide upper portion and narrow base
How do elastic fibres contribute to expiration?
How do elastic fibres contribute to expiration?
Enable passive expiration via recoil
Why does the trachea have C-shaped rather than complete cartilage rings?
Why does the trachea have C-shaped rather than complete cartilage rings?
Gap allows oesophagus to expand
How does bronchi cartilage differ from tracheal cartilage?
How does bronchi cartilage differ from tracheal cartilage?
Bronchi have complete rings
Why do bronchioles lack cartilage?
Why do bronchioles lack cartilage?
Their narrow diameter makes them self-supporting
What is the thickness of the alveolar wall?
What is the thickness of the alveolar wall?
Single layer of epithelial cells
Which tissue component persists throughout all respiratory structures?
Which tissue component persists throughout all respiratory structures?
Elastic fibres
What happens to smooth muscle in airways during exercise?
What happens to smooth muscle in airways during exercise?
Relaxes to increase airway diameter