BIOL 1208 Chapter : Biol 1208 Lab Report
Document Summary
Different polarities from different propanols that pass the hydrophobic lipid bilayer at. Different rates for mammalian erythrocyte (rbl) due to osmosis of h2o and diffusion of. Biological membranes control their internal environment by monitoring what passes through the phospholipid bilayers. The phospholipid bilayer primarily consists of a polar, hydrophilic. Head that faces the water side of the membrane wall and a nonpolar, hydrophobic tail that is enclosed between the hydrophilic heads. These membranes also have proteins that are either integral or peripheral. In other words, based on the molecules" polarity and/or size, the membrane will allow the particle to pass if it is nonpolar and/or small enough to go through the layer. Mammalian erythrocytes (rbc) controls the tonicity through osmosis. Osmosis is the process of molecules in a solvent that pass through a semipermeable membrane down its energy gradient to reach equilibrium. Rbcs will neither hemolyze nor crenate in an isotonic condition.
