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7892 Physiology

As a pa of space-research program, a physiologist was asked to investigate the effect of flight-induced stress on blood pressure. Accordingly, the blood pressure of the cosmonauts were to be measured twice: once before the take-off and once after the spacecraft entered the designated orbit around the eah. For a proper comparison, the preflight blood pressure should be recorded in which position?

AThe sitting position
BThe standing position
CThe lying down position
DAny position, as long as the post-flight recording is made in the same position
Physiology
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