I Three mechanisms for the regulation (1 those that react rapidly within seconds or minutes 2 those that respond over an intermediate time period minutes or hours, those that provide long-term arterial pressure regulation, days, months, and yearsI. Three mechanisms for the regulation: ① those that react rapidly, within seconds or minutes; ② those that respond over an intermediate time period, minutes or hours; ③those that provide long-term arterial pressure regulation, days, months, and years