① Summer came. Room temperature is increased due to the summer heat. Heater increases room temperature. These are in the same direction (red).


② Since these are in the same direction, negative feedback inhibits (blue) the heater (function, such as by turning the power off). Because of this, the room temperature-increasing effect of the heater weakens, and the increase in room temperature (red upward unfilled arrow) disappears (increased room temperature decreases to the baseline).

This simply says, when room temperature is increased (during summer), heaters 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 summer heat, room temperature is increased decreased , and a heater increases decreases room temperature. Since these are in the same direction opposite direction , negative feedback inhibits facilitates the heater (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 increased, negative feedback inhibits facilitates heater (function).