① Winter came. Room temperature is decreased due to the winter chill. Cooler decreases room temperature. These are in the same direction (red).


② Since these are in the same direction, negative feedback inhibits (blue) the cooler (function, such as by turning the power off). Because of this, the room temperature-decreasing effect of the cooler weakens, and the decrease in room temperature (blue downward unfilled arrow) disappears (decreased room temperature increases to the baseline).

This simply says, when room temperature is decreased (during winter), coolers are not used. In the present "Step-By-Step Study of Life Sciences", let's call such control redblue negative feedback.

Challenge Quiz

1. Because of winter chill, room temperature is increased decreased , and a cooler increases decreases room temperature. Since these are in the same direction opposite direction , negative feedback inhibits facilitates the cooler (function). With this control, the initial change in room temperature disappears, namely the room temperature increases decreases (towards the baseline).
2. When room temperature is decreased, negative feedback inhibits facilitates cooler (function).