What is the basis for a change in a person’s blood pressure in a calm state and during work? What parts of the nervous system do this provide?

1) in a calm state, the smooth muscles of the vessels relax, and their lumen increases, the pressure decreases;
2) during work, the smooth muscles of the vessels contract, their lumen narrows, the pressure rises;
3) sympathetic (increases) and parasympathetic (lowers) parts of the autonomic nervous system participate in changes in blood pressure

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