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
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.