Human Gaseous Exchange (Grade 11 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
Which three main components make up the human respiratory system?
Which three main components make up the human respiratory system?
Air passages, lungs, breathing muscles
What is the main function of the epiglottis?
What is the main function of the epiglottis?
Closes to prevent food entering trachea
How thick are the walls of alveoli?
How thick are the walls of alveoli?
One cell thick (squamous epithelium)
Is inhalation an active or passive process?
Is inhalation an active or passive process?
Active process requiring muscle energy
What percentage of nitrogen is present in exhaled air?
What percentage of nitrogen is present in exhaled air?
78%
What percentage of oxygen is in exhaled air during exercise?
What percentage of oxygen is in exhaled air during exercise?
12%
How is most oxygen transported in the blood?
How is most oxygen transported in the blood?
Combined with haemoglobin as oxyhaemoglobin
Which brain structure controls breathing rate?
Which brain structure controls breathing rate?
Medulla oblongata
How does the body adapt to high altitude training?
How does the body adapt to high altitude training?
Increased red blood cells & haemoglobin
What shape are the cartilage rings in the bronchi?
What shape are the cartilage rings in the bronchi?
O-shaped