Question

because the brain is inside the skull, the brain can only swell a small amount. what will happen to the pressure in the brain if water moves into it from the blood? increase decrease stay the same

Explanation:

The skull is a rigid structure. When water moves into the brain from the blood, and the brain's swelling is restricted by the skull, the volume - available for the brain to expand is limited. According to the principle of pressure in a confined space, an increase in volume (even a small one due to water influx) in a fixed - volume space (the skull) will lead to an increase in pressure.

Answer:

Increase