Hydrostatics of the Circulation System: At the level of the human heart, the mea
ID: 3505050 • Letter: H
Question
Hydrostatics of the Circulation System: At the level of the human heart, the mean arterial dlood pressure is about 100 mm Hg. When a person is lying dawn, the arteriai blcod pressures in the regions of the brain and of the feet are roughly 95 mm Hg. Compute the arterial pressures in the brain and the feet for a person standing up (show your calculation for Pums and Pist next to the diagram).-3 pts Given: . The brain is 2 ft above the heart The feet are 4 ft below the heart From the familiar hydrostatic equation (LP-pEdh), we know that blood pressure varies by approximately 25 mm Ha/ft of length. .Explanation / Answer
As we know blood pressure varies 25mmHg/ ft.
It means at levelof brain , 2 ft above heart means 25×2 = 50mmHg less than at level of heart , means 100-50= 50mmHg. Because it is above the heart,there will be reduction in pressure.
And, similarly feet are below heart so there will be increae in pressure. Means 25×4= 100mmHg + 100mmHg= 200mmHg
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