The Control and Mechanism of Breathing (Leaving Cert Biology): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
Which part of the brain controls breathing?
Which part of the brain controls breathing?
Medulla oblongata
What does the medulla oblongata primarily respond to when controlling breathing?
What does the medulla oblongata primarily respond to when controlling breathing?
CO₂ levels in the blood
What forms when CO₂ dissolves in blood plasma?
What forms when CO₂ dissolves in blood plasma?
Carbonic acid
What detects pH changes in the blood caused by CO₂?
What detects pH changes in the blood caused by CO₂?
Chemoreceptors
What is homeostasis?
What is homeostasis?
Maintenance of a constant internal environment
Is inhalation an active or passive process?
Is inhalation an active or passive process?
Active process
What happens to the diaphragm during inhalation?
What happens to the diaphragm during inhalation?
Moves down
What happens to thoracic pressure during inhalation?
What happens to thoracic pressure during inhalation?
Decreases below atmospheric pressure
Is exhalation normally an active or passive process?
Is exhalation normally an active or passive process?
Passive process
What happens to the diaphragm and intercostal muscles during exhalation?
What happens to the diaphragm and intercostal muscles during exhalation?
Both relax
When does exhalation become an active process?
When does exhalation become an active process?
During strenuous exercise
Why does breathing rate increase during exercise?
Why does breathing rate increase during exercise?
More CO₂ is produced from respiration