When certain bacteria are destroyed by the body's white blood cells, chemicals known as PYROGENS (produced by both the pathogens and some of the body's own cells) are released into the bloodstream. When these compounds reach the hypothalamus (of the brain), it responds by resetting its built-in thermostat to a higher value and then initiating physiological processes that produce the rise in body temperature, known as a fever. IDENTIFY and THOROUGHLY EXPLAIN the different MECHANISMS/ACTIONS that are initiated by the hypothalamus once this higher set point has been effected. Your focus here is to describe the mechanisms/processes by which the body temperature is made to rise. In other words, you are to explain HOW the hypothalamus makes the body to elevate and maintain this higher temperature. Note: There is no need to reiterate the background information already provided in this question. (7 points)