In a Positive Feedback System, _______

Question

In a positive feedback system, _______.
A) a change in a condition that varies from the steady state sets off events which intensify the change
B) a stressor inhibits a response
C) a change in a condition that varies from the steady state triggers an opposite response
D) homeostasis is maintained by a variable stressor

Accepted Answer

In a positive feedback system, a change in a condition that varies from the steady state sets off events which intensify the change. This leads to a self-perpetuating cycle that amplifies the initial disturbance. An example of this is the process of childbirth, where the contractions that push the baby towards the birth canal continue to intensify until the baby is delivered.  So, option A is correct. The other options are incorrect as they describe negative feedback systems or are simply incorrect.