Unformatted text preview: Angiogenesis is the growth of new blood vessels to increase perfusion of tissue. In some cases, angiogenesis is regulated hormonally , but often it is locally controlled. For instance, angiogenesis can occur in well-exercised muscles, around vascular obstructions, or towards malignant tumors. It is usually controlled by local growth factors and inhibitors. Neuronal Control of Blood Pressure and Flow The nervous system can also control blood pressure and blood flow. For instance, in response to sensory or emotional stimuli blood pressure and heart rate often rises. Proprioceptors in the body send signals to the cardiac center of the brain stem to alter blood flow and heart rate before metabolic demands increase. Baroreceptors in the aortic arch and internal carotid arteries send a continuous stream of signals to the cardiac center and chemoreceptors respond to information about blood pH, CO 2 and oxygen levels....
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- Fall '10