SCI 9 Respiratory System Quiz

What is the main function of the respiratory system?

• Transport nutrients

• Pump blood

• Exchange gases

• Digest food

Which organ is the primary site of gas exchange?

• Trachea

• Bronchi

• Alveoli

• Diaphragm

What gas is inhaled by the lungs?

• Nitrogen

• Oxygen

• Carbon dioxide

• Helium

What gas is exhaled from the body?

• Hydrogen

• Carbon monoxide

• Carbon dioxide

• Oxygen

What dome-shaped muscle helps with breathing?

• Lung

• Bronchus

• Diaphragm

• Rib

What is the correct airflow pathway?

• Nose → Larynx → Trachea → Bronchi → Alveoli

• Nose → Bronchi → Larynx → Alveoli → Trachea

• Nose → Trachea → Larynx → Alveoli → Bronchi

• Nose → Alveoli → Bronchi → Trachea → Larynx

What structure prevents food from entering the windpipe?

• Larynx

• Epiglottis

• Pharynx

• Uvula

Where are the vocal cords located?

• Pharynx

• Trachea

• Larynx

• Nasal cavity

What part filters, warms, and moistens air?

• Mouth

• Lungs

• Nose

• Bronchi

What traps dust in the trachea and bronchi?

• Mucus and cilia

• Saliva

• Hair

• Enzymes