Respiratory System Quiz

What causes air to flow from the atmosphere into the lungs?

• Decrease in volume in the lungs

• Increase in volume in the lungs

• Increase in pressure in the lungs

• Decrease in pressure in the lungs

Where does gas exchange occur in the lungs?

• Diaphragm

• Capillaries

• Alveoli

• Bronchioles

What happens to the number of active alveoli during exercise?

• Decreases

• Collapses

• Increases

• Remains the same

What is the basis for the ventilation perfusion ratio?

• Air supply

• Blood flow

• Gas exchange

• Carbon dioxide concentration

What happens to the ventilation perfusion ratio when bronchioles dilate?

• Remains the same

• Decreases

• Increases

• Collapses

What is the response of the lungs to an increase in carbon dioxide in the lungs?

• Bronchoconstriction

• Decrease in airflow

• Bronchodilation

• Vasodilation

What causes vasoconstriction in pulmonary arterials?

• High oxygen levels in the blood

• Low oxygen levels in the blood

• High carbon dioxide levels in the blood

• Low carbon dioxide levels in the blood

What is the function of the diaphragm during inhalation?

• Contracts and pulls the lungs down

• Expands and pulls the lungs outward

• Relaxes and moves upward

• Recoils back to a smaller size

What drives gas exchange in the alveoli?

• Diffusion of gases

• Concentration differences of gases

• Blood flow

• Expansion of alveoli

What is the formula for airflow?

• Delta pressure over resistance

• Resistance over delta pressure

• Pressure volume relationship

• Gas exchange formula