一歩一歩学ぶ生命科学
POINT!

① Summer came. Room temperature is increased with 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 control, the room temperature-increasing effect of the heater weakens, and the increased room temperature decreases (towards that before summer).

Namely, the initial change (the increase in room temperature) decreases (red upward unfilled arrow disappears).


This simply says, when room temperature is increased (with the summer heat), 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.

With the 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). 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 summer). Namely, the initial change (the increase in room temperature) increases decreases (disappears) .

2.

With the 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).

3.

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

4.

When room temperature is increased, 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 summer). Namely, the initial change (the increase in room temperature) increases decreases (disappears) .