Quiz: Gaseous Exchange in the Respiratory System

Large surface area, well ventilated, richly supplied with blood vessels, thin surface, well protected, permanently moist Large surface area, well oxygenated, blood supply, thick surface, protected, dry Small surface area, ventilated, blood vessels, thin surface, exposed, moist Medium surface area, partially ventilated, some blood vessels, variable thickness, protected, occasionally moist

Air that flows halfway down the bronchi but doesn't enter the alveoli Air that completely fills the lungs to capacity Air that only stays in the trachea Air that immediately enters the alveoli

Air that remains in lungs to prevent collapse The total amount of air breathed in The amount of oxygen in the blood The maximum lung capacity

Each gas follows its own pressure gradient All gases have the same pressure Only oxygen has pressure in the lungs Pressure only exists in the alveoli

True

False

Diffusion from the bronchi Direct flow from the trachea Mechanical pulling Active transport