Respiratory System and Gas Exchange Quiz

What is the primary function of the pulmonary arteries in the lungs?

• To carry oxygenated blood to the heart

• To remove carbon dioxide from the lungs

• To transport deoxygenated blood from the heart to the lungs

• To supply nutrients to lung tissues

Which structure in the respiratory system is responsible for branching into the right and left primary bronchi?

• Bronchioles

• Alveoli

• Trachea

• Pulmonary veins

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

• To facilitate gas exchange between air and blood

• To filter air before it reaches the lungs

• To transport oxygenated blood to the heart

• To humidify and warm the air

How thick is the wall of the alveoli, and why is this important?

• Two cell layers thick, to provide structural support

• Three cell layers thick, to prevent air leakage

• Four cell layers thick, to protect against pathogens

• One cell layer thick, to allow efficient gas exchange

What is the function of the pulmonary veins in the circulatory system?

• To supply nutrients to the heart

• To remove waste products from the blood

• To transport oxygenated blood from the lungs to the heart

• To carry deoxygenated blood to the lungs