The respiratory system quiz

What is the primary function of alveoli in the respiratory system?

• To transport air to the lungs

• To exchange gases between air and blood

• To filter out dust particles

• To produce mucus

Which type of epithelium lines the trachea?

• Stratified squamous epithelium

• Simple squamous epithelium

• Ciliated pseudostratified columnar epithelium

• Transitional epithelium

What is the role of cilia in the respiratory system?

• To produce oxygen

• To trap and move mucus upwards

• To absorb carbon dioxide

• To humidify inhaled air

What surrounds the alveoli to allow efficient gas exchange?

• Smooth muscle

• Capillaries

• Bronchioles

• Cartilage

What prevents the trachea from collapsing during breathing?

• Cartilaginous rings

• Alveolar sacs

• Mucous lining

• Diaphragm movement

Which structure connects the trachea to the lungs?

• Larynx

• Bronchi

• Pharynx

• Alveoli

What happens to the diaphragm during inhalation?

• It relaxes and moves upwards

• It contracts and flattens

• It remains stationary

What is the purpose of mucus in the respiratory system?

• To absorb oxygen

• To trap dust and pathogens

• To cool the respiratory tract

• To exchange gases

How is carbon dioxide transported out of the body?

• By red blood cells to the brain

• By plasma to the heart

• By red blood cells to the alveoli

• By plasma to the alveoli