| When room temperature is increased, negative feedback facilitates/inhibits cooler/heater (function). And when room temperature is decreased, negative feedback facilitates/inhibits heater/cooler (function). |
| When room temperature is increased,（red → blue）negative feedback inhibits heater (function). | When room temperature is decreased,（blue → red）negative feedback facilitates heater (function). |
| When room temperature is increased,（blue → red）negative feedback facilitates cooler (function). | When room temperature is decreased,（red → blue）negative feedback inhibits cooler (function). |
Heaters are used in the winter and coolers are used in the summer (because they are "in the opposite direction", respectively).
Heaters are not used in the summer and coolers are not used in the winter (because they are "in the same direction", respectively).
Challenge Quiz
Since increase in room temperature and the effect of cooler heater are in the same oppostite direction, negative feedback inhibits the equipment (function).
Since decrease in room temperature and the effect of cooler heater are in the same oppostite direction, negative feedback facilitates the equipment (function).
Since decrease in room temperature and the effect of cooler heater are in the same oppostite direction, negative feedback inhibits the equipment (function).
Since increase in room temperature and the effect of cooler heater are in the same oppostite direction, negative feedback facilitates the equipment (function).
When room temperature is increased, negative feedback inhibits cooler heater (function).
When room temperature is decreased, negative feedback facilitates cooler heater (function).
When room temperature is decreased, negative feedback inhibits cooler heater (function).
When room temperature is increased, negative feedback facilitates cooler heater (function).