With increasing distance from the heart, arterial A. Walls contain re

1.	With increasing distance from the heart, arterial A. Walls contain relatively more smooth muscle than elastic tissue. B. Flow has a greater tendency to be turbulent. C. Mean pressure tends to rise slightly. D. Pulse pressure tends to increase slightly. E. PO2 falls appreciably
Answer» A. True The relative amount of smooth muscle increases but that of elastic tissue falls. B. False With the decreasing vessel diameter and flow velocity, the tendency decreases. C. False It falls slightly; blood will only flow down a pressure gradient. D. True Distal arterial pulse pressure is increased by the superimposition of waves reflected back from the end of the arterial tree. E. False Blood cannot release its oxygen until it reaches the exchange vessels.

With increasing distance from the heart, arterial A. Walls contain relatively more smooth muscle than elastic tissue. B. Flow has a greater tendency to be turbulent. C. Mean pressure tends to rise slightly. D. Pulse pressure tends to increase slightly. E. PO2 falls appreciably

Answer»

A. True The relative amount of smooth muscle increases but that of elastic tissue falls.

B. False With the decreasing vessel diameter and flow velocity, the tendency decreases.

C. False It falls slightly; blood will only flow down a pressure gradient.

D. True Distal arterial pulse pressure is increased by the superimposition of waves reflected back from the end of the arterial tree.

E. False Blood cannot release its oxygen until it reaches the exchange vessels.

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With increasing distance from the heart, arterial A. Walls contain relatively more smooth muscle than elastic tissue. B. Flow has a greater tendency to be turbulent. C. Mean pressure tends to rise slightly. D. Pulse pressure tends to increase slightly. E. PO2 falls appreciably

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