... called the solute(s). When water is the solvent, the solution is called an aqueous solution. In an aqueous solution, most of the water is in its molecular form, H2O. However, a small amount of the water will dissociate into ions - one hydrogen ion (H+) and one hydroxide ion (OH-) per molecule dissociated ... . The pH scale is used to measure the concentration of hydrogen ion in an aqueous solution. With pH measurements, the letter p indicates negative log and H ... glycoprotein surface markers. The phospholipid bilayer, because of its non-polar, hydrophobic tails, is a barrier to many l...

• Word Count: 10700
• Approx Pages: 43
• Grade Level: High School

... process of diffusion of water is a passive process, meaning without any use of energy. Diffusion is imperative for the distribution of ion and other solutes within a cell. Small molecules and ions may move from one end of an organelle to another in a fraction of a millisecond, or from the center of a cell to its surface almost as fast. There are two types ... of diffusion across the membrane barrier: OSMOSIS: It depends on concentration of solutes in an aqueous solution on the two sides seperated by a membrane. Solute concentration is related to osmotic pressure. Greater the solute conc...

• Word Count: 954
• Approx Pages: 4
• Grade Level: Undergraduate

... the cell, water will pass into the cell through the process above. If the cell surroundings have a greater concentration, then water disperses from the cell. When unequal solute concentrations in aqueous solutions are on either side of semi permeable membrane, water always moves from the hypotonic solution (lower solute concentration and higher water molecule concentration), to the hypertonic solution (higher solute ... carried through membrane associated pumps. Special transport macromolecules that exist in the cell membrane move molecules across the membrane. Among the molecules that ...

• Word Count: 1290
• Approx Pages: 5
• Has Bibliography
• Grade Level: Undergraduate