Question

question 3
which of the following refers to an instrument used to \measure oxygen levels\?
a bronchospasm
b endoscope
c oximeter
d spirometer

question 4
\tracheostenosis\ would refer to _______ of the trachea.
a narrowing
b widening

Explanation:

Question 3

• Option A: Bronchospasm is a condition (constriction of bronchi), not an instrument.
• Option B: Endoscope is used for visualizing internal organs, not measuring oxygen.
• Option C: Oximeter is specifically designed to measure oxygen saturation (levels) in blood.
• Option D: Spirometer measures lung function (volume of air inhaled/exhaled), not oxygen levels.

The suffix “-stenosis” means narrowing (e.g., stenosis in medical terms refers to abnormal narrowing of a passageway). So “tracheostenosis” refers to the narrowing of the trachea. Option B (widening) is incorrect as widening would be related to terms with suffixes like “-ectasis” (e.g., tracheectasis).

Answer:

C. oximeter

Question 4