一歩一歩学ぶ生命科学
POINT!

① Winter came. Room temperature is decreased with the winter chill. Heater increases room temperature. These are in the opposite direction (blue).


② Since these are in the opposite direction, negative feedback facilitate (red) the heater (function, such as by turning the power on). Because of this control, the room temperature-increasing effect of the heater strengthens, and the decreased room temperature increases (towards that before winter).

Namely, the initial change (the decrease in room temperature) decreases (blue downward unfilled arrow disappears).


This simply says, when room temperature is decreased (with the winter chill), heaters are used. In the present "Step-By-Step Study of Life Sciences", let's call such control bluered negative feedback.

Challenge Quiz

1.

With the winter chill, 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). Beacause of this control, the room temperature-increasing effect of the heater strengthens weakens , and the increased decreased room temperature decreases increases (towards that before winter). Namely, the initial change (the decrease in room temperature) increases decreases (disappears) .

2.

With the winter chill, 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).

3.

When room temperature is decreased, negative feedback inhibits facilitates heater (function).

4.

When room temperature is decreased, negative feedback inhibits facilitates heater (function). Because of this control, the room temperature-increasing effect of the heater strengthens weakens , and the increased decreased room temperature decreases increases (towards that before winter). Namely, the initial change (the decrease in room temperature) increases decreases (disappears) .