Certain compounds, such as water, can pass across the cell membrane by traveling in the lipid bilayer.

Water passes the cell membrane by travelling through protein channels in the lipid bilayer. 
The lipid bilayer has a non-polar interior, meaning polar molecules are not able to pass through them. To facilitate the movement of such molecules in and out of the cell, there are protein channels present in the membrane. The channels that assist the movement of water molecules are called aquaporins.

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.