Final answer:
Static pressure refers to the pressure exerted by a fluid, typically a gas, within an enclosed space and is measured from lines attached at varying points, not necessarily just at the destination.
Step-by-step explanation:
Static pressure is the pressure exerted by a fluid in an enclosed space. When static pressure is measured in a gas system, it is typically taken from lines attached at various points to assess the pressure conditions within the system. In the context of blood circulation, static pressure would be about zero at the midpoint of a capillary bed. However, for the question provided, option B, which suggests that static pressure is the pressure of gas and is taken from lines attached at the destination, is incorrect.
Gases indeed exert pressure—defined as force per unit area—and the pressure of a gas may be measured in units like pascal, torr, or atmosphere. A barometer is used for measuring atmospheric pressure, and manometers are used for measuring other types of gas pressures. In particular, the pressure of a sample of gas can be measured with an open-end mercury manometer, which involves measuring the difference in mercury levels in the two arms of the U-shaped tube.
As for the flow of gas, it generally moves from an area of high pressure to an area of low pressure, making option D (high; low) the correct choice for that component of the question.