A Person Who Sits for Hours on a Long Airplane

question 18

Multiple Choice

A person who sits for hours on a long airplane flight will have problems will blood pooling below the knees.Why?

• A)The valves in the leg veins don't work above a certain altitude.
• B)Blood pressure drops on long airplane flights.
• C)The respiratory pump is not helping blood return to the heart.
• D)The capillaries expand at high altitudes.
• E)The skeletal muscle pump below the knees is not helping blood return to the heart.

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