Why brain cells swell when the blood plasma is very dilute?

Answer 1

Osmosis is the movement of water from a High Water (Dilute Solution) to a Low Water (Strong Solution).

If blood plasma becomes very dilute with water, when it travels to the brain the brain cells will swell because the are taking on too much water. This happens because the high concentration of water (in the blood) is moving to the lower concentration of water (brain cells) making the cells swell as they are taking on too much water.

Answer 2

Brain cells swell when blood plasma is very dilute due to a process called osmosis. In this case, water moves into the brain cells in an attempt to balance out the concentration of solutes inside and outside the cells, causing them to swell. This can lead to cellular dysfunction and potentially dangerous consequences.