Respiratory System Multiple Choice Questions

What is the primary function of the respiratory system?

• Pump blood

• Break down food

• Exchange gases

• Produce hormones

What gas is taken into the body during inhalation?

• Carbon dioxide

• Oxygen

• Nitrogen

• Helium

Which organ is mainly involved in gas exchange?

• Heart

• Liver

• Lungs

• Stomach

Which tube carries air from the larynx to the lungs?

• Esophagus

• Trachea

• Aorta

• Diaphragm

Which tiny structures in the lungs are responsible for gas exchange?

• Bronchi

• Alveoli

• Capillaries

• Nephrons

What muscle helps you breathe in and out by moving up and down?

• Biceps

• Diaphragm

• Trachea

• Sternum

During exhalation, which gas is mainly removed from the body?

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

What happens to the diaphragm when you inhale?

• It relaxes and moves up

• It contracts and moves down

• It stays still

• It expands sideways