E. False As in skin, renal blood flow (about one quarter of total cardiac output) greatly exceeds local metabolic needs. The blood is sent to the kidneys for processing.

70. A. True About 10 mmHg or less; both offer little resistance to flow. B. False The drop across the splenic vascular bed (about 60 mmHg) is much larger; the

hepatic portal bed offers little resistance to flow. C. True Otherwise blood would not flow through the portal bed. D. False Changing from the horizontal to the vertical position increases arterial and

venous pressures equally. E. True The muscle pump in the leg decreases venous pressure.