Explain how this is an example of a negative feedback loop.
A negative feedback loop is a process in which the output of a system is fed back into the system as an input, but in a way that reduces the output.
In this example, let's say a person's body temperature rises due to external heat. As a response, the person's body activates mechanisms to cool down, such as sweating and vasodilation. This helps to lower the body temperature back to a normal level. Once the body temperature returns to normal, the cooling mechanisms are turned off.
This is an example of a negative feedback loop because the initial increase in body temperature triggered a response (cooling mechanisms) that served to reduce the body temperature back to the normal level. The feedback loop functioned in a way that counteracted the initial change, maintaining equilibrium within the system.