Question

multiple choice question
what is a physician measuring using a sphygmomanometer?
the concentration of oxygen gas in arterial blood
the volume of blood expelled from the left ventricle during a single contraction
systemic arterial blood pressure

Explanation:

A sphygmomanometer is a medical device used to measure blood pressure. Specifically, it measures systemic arterial blood - pressure. The concentration of oxygen gas in arterial blood is measured by other means, and the volume of blood expelled from the left ventricle during a single contraction is stroke - volume which is not measured by a sphygmomanometer.

Answer:

C. Systemic arterial blood pressure