AP PSYCHOLOGY

Detailed explanation-1: -The type of signal used in a heating system is called negative feedback because the system is turned off by the condition it produces.

Detailed explanation-2: -Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.

Detailed explanation-3: -Another example of negative feedback is the regulation of the blood calcium level. The parathyroid glands secrete parathyroid hormone, which regulates the level of calcium in the blood. If calcium decreases, the parathyroid glands sense the decrease and secrete more parathyroid hormone.

Detailed explanation-4: -Negative feedback occurs to reduce the change or output: the result of a reaction is reduced to bring the system back to a stable state.