Respiratory System QuizOnline version Test your knowledge on the respiratory system with these engaging questions! by Elspeth Dixon 1 What is the primary function of the respiratory system? a To digest food. b To circulate blood. c To produce hormones. d To facilitate gas exchange. 2 Which part of the respiratory system is responsible for gas exchange? a Trachea. b Alveoli. c Bronchi. d Lungs. 3 What muscle aids in the process of breathing? a Diaphragm. b Pectorals. c Quadriceps. d Biceps. 4 What is the main organ of the respiratory system? a Kidneys. b Lungs. c Heart. d Liver. 5 What structure filters and warms the air we breathe? a Nasal cavity. b Pharynx. c Larynx. d Trachea. 6 Which gas do we primarily inhale? a Carbon dioxide. b Oxygen. c Nitrogen. d Helium. 7 What is the role of the epiglottis? a To filter air. b To produce sound. c To exchange gases. d To prevent food from entering the trachea. 8 What is the term for the process of breathing out? a Inhalation. b Exhalation. c Ventilation. d Respiration. 9 Which condition is characterized by difficulty in breathing? a Hypertension. b Asthma. c Arthritis. d Diabetes. 10 What is the primary purpose of the alveoli? a To produce mucus. b To increase surface area for gas exchange. c To filter blood. d To store air.
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