Neutrophils are the most common type of white blood cell, comprising about 50-70% of all white blood cells. They are phagocytic, meaning that they can ingest other cells, though they do not survive the act. Neutrophils are the first immune cells to arrive at a site of infection, through a process known as chemotaxis.
One of the basic theories stipulates that increasing interest rates raise consumers' and manufacturers' costs, which, in turn, reduces the amount of time and money people spend driving. Less people on the road translates to less demand for oil, which can cause oil prices to drop.
High gas prices are also caused by high crude oil prices. That's because oil costs account for 72% of the price of gasoline. The remaining 28% comes from distribution, refining and taxes, which are more stable. When oil prices rise, you can expect to see it at the gas pump six weeks later.