“…85 Recently, HIF-derived increases in skin iNOS expression have been shown to divert blood flow toward the skin, causing a reduction in kidney perfusion and accentuating renal hypoxic responses. 82 Finally, nNOS has been implicated in the regulation of a number of important cardiovascular responses: 1) In the brain, nNOS facilitates synaptic transmission and controls neuronal regulation of HR and mean arterial pressure; 86,87 nNOS can also regulate neurovascular control of cerebral blood flow; 88,89 2) In the heart, nNOS affects contraction and relaxation of cardiac myocytes by regulating intracellular calcium; 90 Fig. 3 Representative diagram of the oxyhemoglobin dissociation curve demonstrating estimated microvascular blood oxygen saturation (S mv O 2 ) levels derived from measured microvascular PO 2 levels in control, anemic, and anemic b-blocked rats.…”