Answer:
In this case blood pressure is affected by increases and decreases of blood volume (liters of blood in the organism). Excessive salt intake increases sodium concentrations in the body. Given the fact that sodium increases liquid retention, the blood volume increases and so does the blood pressure.
Step-by-step explanation:
The kidneys are in charge of sodium/water regulation. When sodium levels in the organism increase, there is a renal mechanism to try to eliminate this excess. When the sodium levels are excessively high this mechanism turns out to be insufficient and therefore, the concentration of sodium in the body stays elevated. Since sodium is an active osmotic compound (means drags water where it goes), water is retained in the organism, hence blood volume increases, causing blood pressure to raise.