Medical Science Quiz

What is the main function of the respiratory system?

• Digestion

• Muscle movement

• Vision

• Gas exchange

Which part of the respiratory system carries air to and from the site of exchange?

• Diaphragm

• Alveoli

• Trachea

• Nasal cavity

What is the function of the trachealis muscle?

• Supports the trachea

• Relaxes during coughing

• Produces mucus

• Contracts during swallowing

Which cells secrete surfactant lipoproteins and mucins in the fluid layer on the epithelial surface of the terminal bronchioles?

• Type I pneumocytes

• Type II pneumocytes

• Club cells

• Alveolar macrophages

What is the main function of the olfactory epithelium?

• Gas exchange

• Temperature regulation

• Smell reception

• Sound production

What is the role of the alveoli in the respiratory system?

• Producing mucus

• Gas exchange

• Storing oxygen

• Filtering air

Which structure prevents swallowed food from entering the air passageways?

• Epiglottis

• Vocal folds

• Trachea

• Conchae

What is the function of the alveolar macrophages?

• Secrete mucus

• Produce surfactant

• Remove debris

• Gas exchange

Which cells make up 97% of the alveolar surface and serve as a gas-permeable component of the blood-air barrier?

• Club cells

• Alveolar macrophages

• Type I pneumocytes

• Type II pneumocytes

What is the primary function of the nasal cavities?

• Gas exchange

• Temperature regulation

• Sound production

• Preliminary filtration of inspired air