sarika
Forum Guru
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`coronary, cerebral, pulmonary have autoregulation
Renal and Gi systems have autoregulations under normal circumstances.
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| mildus
Forum Guru
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Generally speaking, regulation can be neural, humoral and local or autoregulation.
In some areas, neural regulation is dominant (skin, GI) while in others it is autoregulation which is dominant (heart, brain). For lungs I'm not sure (I think there is both local and neural control). Muscles have sympathetic cholinergic vasodilatator signals or beta2 adrenergic vasodilatator signals especially immediately before the activity, but during the activity local regulation is dominant. The kidneys also have autoregulation but in some cases neural control is stronger (like in severe haemorrhage).
In stress or shock, when there is not enough blood, the body wants to shift blood from GI, skin and the kidney to the brain (to be able to think quickly), the heart (to be able to pump blood more quckly and more strongly) and the muscles (to be able to run away) - this is mediated by sympathetic nervous system and hormones but also autoregulation in brain, heart and muscle.
But all the autoregulations have limits.
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