If a person's body temperature were 37.5 °C (99.5 °F), the Hypothalamus would stimulate the thyroid to lower the temperature.
Step-by-step explanation:
If a person’s body temperature were 37.5oC (99.5oF), the hypothalamus would stimulate the thyroid for thermoregulation. To maintain the core temperature of the body is very important even if the surrounding temperature alters.
If the temperature rises or lowers the hypothalamus reacts instantly and initiate several process to keep the core temperature in line. Either it causes shivering or sweating or induce different mechanisms to maintain the body temperature.