In the negative feedback system that typically controls the
     In the negative feedback system that typically controls the temperature of a home in winter, the furnace acts as the ...  efferent pathway  afferent pathway  integrating center  effector 
  
  Solution
effector
Explanation:
In a negative feedback mechanism the thermostat is the receptor. If the heating is set at 75 degrees Fahrenheit, the furnace (effector) is turned on if the temperature drops below 75 degrees Fahrenheit.

