Question

what is the meaning of feedback mechanism ?

Answer 1

A response within a system that influences the continued activities or productivity of that system. In essence it is the control by biological reaction by the end products of that reaction

Answer 2

Feedback, in biology, a response within a system (molecule, cell, organism, or population) that influences the continued activity or productivity of that system. In essence, it is the control of a biological reaction by the end products of that reaction.