Human Breathing System Quiz

What is the function of the epiglottis?

• To exchange gases in the alveoli

• To filter air in the nose

• To close off the trachea when swallowing

• To produce sound by vibrations

Which part of the brain is responsible for controlling breathing rate?

• Frontal lobe

• Parietal lobe

• Medulla oblongata

• Cerebellum

What is the main function of alveoli?

• To warm and moisten the air

• To exchange gases by diffusion

• To dilate the bronchioles

• To produce mucus for capturing harmful bacteria

What is the cause of asthma?

• Passive exhalation

• Dust or allergens

• Rich blood supply

• Increased carbon dioxide levels

How does oxygen travel through the blood?

• By haemoglobin in red blood cells

• By plasma

• By cilia in the trachea

• By intercostal muscles

What is the function of the larynx?

• To dilate the bronchioles

• To produce sound by vibrations

• To close off the trachea when swallowing

• To exchange gases in the alveoli

What is the effect of exercise on the rate of breathing?

• Decreases the rate of respiration

• Increases the rate of respiration

• Causes asthma attacks

• Stops gas exchange in the alveoli

What is the main benefit of breathing through the nose?

• To exchange gases in the alveoli

• To produce sound by vibrations

• To filter air with hairs and mucous

• To dilate the bronchioles

What is the function of the trachea in the respiratory system?

• To produce mucus for capturing harmful bacteria

• To dilate the bronchioles

• To protect the trachea with rings of cartilage

• To exchange gases in the alveoli

How is carbon dioxide removed from the body during breathing?

• By active exhalation

• By cilia in the trachea

• By plasma

• By haemoglobin in red blood cells