Blood pressure is determined by the amount of force used to push blood through the veins when the heart beats and when. it rests. Blood pressure usually runs higher if the heart pumps more blood through the arteries or narrower rigid arteries resist the blood flow. If less blood is pumped through the arteries or arteries are larger and more flexible the blood pressure lower. The body is able to adjust blood pressure by changing the amount of blood pumped into arteries the amount and volume of blood and the amount of the arteries resist blood flow. The nerves send signals to the heart arteries and kidneys so that they can make the necessary adjustments. The heart may beat faster and pump more blood. The effects immediately make a difference in blood pressure.
Veins and arteries
veins and arteries can be wider to store larger amounts of blood and sending smaller amounts of blood back to the heart. When the heart is pumping less blood the pressure becomes lower. Veins and arteries can also increase low blood pressure levels when they narrow to store less blood in the arteries and pump more blood back to the heart. The power needed to pump a higher amount of blood through veins and arteries increases blood pressure. As the heart adjustments of veins and arteries begin adjusting blood pressure immediately.
Kidneys can do more or less urine to raise or lower blood pressure. More urine means less blood to fill the veins and arteries and blood pressure goes down. Less urine means more blood fills the veins and arteries causing blood pressure to rise. The arteries of the kidneys determine how much salt and water pass out of the body in urine. Enzymes form hormones to regulate the amount of blood in the arteries. Increased or decreased urine output may take weeks to make a difference in blood pressure readings.