An effector is the component in a feedback system that causes a change to reverse the situation and return the value to the normal range. Blood vessels in the skin begin to dilate allowing more blood ...An effector is the component in a feedback system that causes a change to reverse the situation and return the value to the normal range. Blood vessels in the skin begin to dilate allowing more blood from the body core to flow to the surface of the skin allowing the heat to radiate into the environment. These nerve cells send messages to the brain, which in turn causes the pituitary gland at the base of the brain to release the hormone oxytocin into the bloodstream.
