PSYC 2410 Lecture Notes - Lecture 1: Peripheral Membrane Protein, Action Potential, Adenosine Triphosphate

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2410
• Professor: Elena Choleris

Document Summary

Polar head (glycerol phosphate) hydrophilic (water-loving) Two nonpolar fatty acid tails hydrophobic (water-fearing) Nonpolar areas from a hydrophobic region between the hydrophilic heads. Ay body temperatures the interior of the bilayer is fluid. Transmembrane or integral proteins: have hydrophobic and hydrophilic regions o. Can help the functions of transmembrane proteins o o. Lipids of membrane form a barrier to hydrophilic molecules. Facilitated diffusion: active transport: requires energy consumption (mitochondria) o. Movement of substance (liquid or gas) along a concentration gradient. Membrane potential: difference in electrical charge between the inside and the outside of a cell. Neuronal resting potential: -70 mv (inside more negative than outside) Sodium: na+, potassium: k+, chloride cl-, protein ions . Sodium na+ and chloride cl- = more concentrated outside the cell (physiological saline) Potassium k+ and protein ions- = more concentrated inside the cell. Overall: inside more negative than outside (-70mv at rest)