... able to move through selective permeable cellular membranes. They must regulate moving necessary materials in and out of the cell in order to maintain homeostasis. Because of a cell's aqueous environment, it allows water to pass by osmosis or aquaporins. With osmosis, water can move throughout the membranes of a cell, down its concentration gradient. Water moves from areas ... solute with a smaller volume to diffuse into. More solutes enter the cell with a larger surface area to volume ratio. Materials: - 2% agar containing NaOH and the pH-indicator dye phenolphthalein - 1% phenolphtha...

• Word Count: 2017
• Approx Pages: 8
• Grade Level: High School

... active transport', which requires a specialised carrier molecule, as well as a source of energy. Osmosis Osmosis is a special type of diffusion. It is the movement of water molecules from a weak solution to a strong solution. Osmosis involves water diffusing through a semi-permeable membrane. This process will continue on until the solutions on either side of the membrane are of equal concentration. If the internal ... 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...

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