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Blood Pressure Physiology (view source)
Revision as of 19:20, 25 October 2010
, 19:20, 25 October 2010→Stimulus for activation
===='''''Stimulus for activation'''''====
===='''''Stimulus for activation'''''====
A drop in cardiac output results in a drop in arterial blood pressure, which is sensed by baroreceptors (pressure-sensitive nerve endings) located in the carotid sinus and aortic arch. This information is relayed to the vasomotor centre (VMC) of the brainstem. A drop in signals from the baroreceptors in response to perceived hypoperfusion leads to a central increase in activity of the sympathetic nervous system and an increased release of adrenaline from the adrenal medulla.
A drop in cardiac output results in a drop in arterial blood pressure, which is sensed by baroreceptors (pressure-sensitive nerve endings) located in the carotid sinus and aortic arch. A drop in signals from the baroreceptors to the vasomotor centre (VMC) of the brainstem in response to perceived hypoperfusion leads to a centrally controlled increase in activity of the sympathetic nervous system and an increased release of adrenaline from the adrenal medulla.
===='''''Response to stimulus'''''====
===='''''Response to stimulus'''''====