A test where a patient breathes in and blows out as hard and long as possible into a machine that measures lung function is called

• A. X-ray
• B. Pulmonary Function Test
• C. Spirometry
• D. MRI

Answer: (B)

Understanding how the lungs work is about function, not just appearance. The scenario describes a test that measures how much air you can move and how quickly you can move it, using a device that records airflow and volume during forced breathing. That set of measurements is called a pulmonary function test, which is the umbrella term for assessing lung function and can include the spirometry maneuver as its core component. Spirometry specifically focuses on measures like how much air you can exhale and how fast, but the overall test described fits the broader pulmonary function testing category. Imaging options like X-ray or MRI show anatomy or structure, not the functional airflow measurements used here. So the best description for this scenario is a pulmonary function test.