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36369 Physiology

As a part 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 was to be measured twice: Once before the takeoff and once after the spacecraft entered the designated orbit around the earth. For a proper comparison, the preflight blood pressure should be recorded in:

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