MICROANATOMY

Detailed explanation-1: -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-2: -Definition. (1) A feedback in which the system responds to the perturbation in the opposite direction as the perturbation. (2) A feedback mechanism resulting in the inhibition or the slowing down of a process.

Detailed explanation-3: -Positive feedback occurs to increase the change or output: the result of a reaction is amplified to make it occur more quickly. 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.

Detailed explanation-4: -The type of feedback in a control system in which the feedback signal and the reference input signal are out of phase is called a negative feedback. In simple words, when the reference input signal and the feedback signal are subtracted at the input of the system, then the feedback is known as negative feedback.