An important "vital sign" for monitoring human health is blood pressure. In particular, doctors want to know what the pressure of a patient's blood is as it passes through the heart. Use the energy density model with energy- density-system representation to logically respond to these FNT prompts.
(a) What are the two separate fluid systems when a cuff is used measure a person’s blood pressure. Are the two systems connected, and if so, how?
(b) Why is blood pressure normally measured with a cuff around the upper arm with the person sitting upright?
(c) Suppose you want to measure the blood pressure of a person and for whatever reason (perhaps due to injury), you are not able to use an upper arm of the person to measure the blood pressure, so you have to use a leg instead. In what position would you place the person before making the measurement? Why?
(d) Given that you want to find the pressure at heart level, and if you knew what the normal blood pressure at that level should be, show how you could calculate the percent error you would get if you measured a patient’s blood pressure on the patient’s leg while the patient was sitting up?