Which statements about feedback systems are correct? A negative feedback system tends to decrease the stimulus that affects it. A positive feedback loop, involving the kidney, maintains blood homeostasis. A positive feedback system would be unable to maintain homeostasis, since it would be unable to maintain any type of equilibrium. An example of how the body uses a positive feedback system to maintain body temperature is the release of sweat onto the surface of the skin. A feedback system requires coordination between the sensory receptors, an integrator center, and an effector.