An immune response occurs when antibodies, which are proteins in your immune system, are summoned to attack an antigen. When you say you are blood type A, what you are telling people is that the cells in your body make antibodies only to type B antigens.
Best Answer: Blood pressure elevates when the arterioles constrict, which increases the volume carried in the larger arteries, which increases the pressure exerted against the interior walls of those arteries.When vessels constrict, they tighten, and reduce the amount of space inside.ee constrict think choke. Constricting arteries mean the diameter of the hollow part of the arteries where the blood flows is getting smaller. This generally increase blood pressure. When the blood vessel dilates, the diameter increases, lowering blood pressure.
High blood pressure is diagnosed with consistent numbers of the top above 140 and the bottom above 90. Sudden high blood pressure occurs when a spike in your high blood pressure happens suddenly and stays high. High blood pressure occurs when the force of the blood flowing through narrow arteries is greater than usual, making the heart work harder to circulate the blood through the bodyâs blood vessels.