Question

post - assessment
question 1 of 10
a peak flow meter measures the
amount of oxygen in the airways
amount of flow from the large airways
amount of flow from the nose
speed of blood flow

Explanation:

A peak flow meter is a device used to measure the maximum speed of expiration (how fast a person can blow air out of their lungs), specifically the airflow from the large airways (like the trachea and main bronchi) during a forced exhalation. It does not measure oxygen in airways (that's not its function), flow from the nose (it's about lung - related airflow), or blood flow speed (that's for devices measuring vascular flow). So the correct option is the one about the amount of flow from the large airways.

Answer:

B. amount of flow from the large airways (assuming the options are labeled A, B, C, D with A being "amount of oxygen in the airways", B being "amount of flow from the large airways", C being "amount of flow from the nose", D being "speed of blood flow")