Urology/Kidney/Tubules/WaterChannels/ControlToWaterIntake/basic
ナビゲーションに移動
検索に移動
POINT!
| With water intake, the (red→blue) negative feedback decreases the number of water channels. |
① Water intake decreases plasma osmolarity, and water reabsorption (through the water channels) decreases plasma osmolarity. These effects are in the same direction (red).
② Since these effects are in the same direction (red), negative feedback decreases (blue) the number of water channels and the water reabsorption. The plasma osmolarity-decreasing effect of the water reabsorption becomes weaker, and the plasma osmolarity returns to normal.
Challenge Quiz
1.
Water intake increases decreases plasma osmolarity, and water reabsorption (through the water channels) increases decreases plasma osmolarity. Since these effects are in the same opposite direction, negative feedback increases decreases the number of water channels.