Physiology 2130 Lecture 2: 1 - The Interaction of the Cell With its Environment
21 Sep 2015
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1 - the interaction of the cell with its environment. Monday, september 21, 2015. The movement of molecules from an area of higher concentration to an area of lower concentration due to a molecules random thermal motion. The greater the concentration gradient is the greater the diffusion is. The thicker the membrane the less diffusion there is. The more lipid soluble the molecules the faster it will diffuse. The large the molecule is the longer it will take for it to diffuse. The greater the membrane surface are the greater the diffusion. If there"s a greater membrane surface are than there"s more room for molecules to diffuse through the membrane. The composition of the lipid bilayer affects what can diffuse through the membrane. A hydrophobic molecule can get through the hydrophilic heads because the molecules naturally mingle close to the hydrophilic heads.
