BIOL 101 Lecture Notes - Lecture 7: Lysosome, Polysaccharide, Membrane Potential
Document Summary
Mosaic -more than one component to the protein integral protein - integrated itself in the cell. Peripheral- found inside or outside of the cell. Fluid - lipids can move around the cell (proteins also moving) Can be altered, presence or absence of unsaturated fats -fluidity increases with kinks and decreases with no kinks. Can affect the permeability of the membrane ex. cholesterol increased fluidity - the animal cell membrane gets pushed. Lateral movement - move left or right ~2 micrometer/second. Properties of biological membranes - fluid, mosaic, regulatory. Plasma membrane- protein-transport, enzymatic activity, signal transduction(messaging of signals, not actual touching), cell-cell recognition(sperm-egg-mediated by glycoprotein), intercellular joining(more permanent and cells coming together[gap,tight,intercellular]), attachment to the cytoskeleton and ecm (extracellular matrix) Diffusion -things spread out, due to kinetic energy, spontaneous process [delta g = -], increase in entropy(disorder), follow the concentration gradient [high to low concentration] Diffusion independently - no dependency, but maintains equilibrium.
