BIOB34H3 Lecture Notes - Lecture 6: Paracellular Transport, Phospholipid, Hydrophile
23 Sep 2016
School
Department
Course
Professor
Document Summary
Describe molecular structure of phospholipids and how it helps determine membrane properties. Describe how receptors are used by cells to transmit extracellular signals. Identify apical/basolateral regions and junctions of epithelia. Differentiate transcellular and paracellular paths for molecular transport. They are insoluble because they have non-polar structures. Class of mol that are insoluble in water. Amphipathic have both polar and nonpolar structures. Makes parts of them hydrophobic and others hydrophilic. Hydrophobic parts join together forming the core and hydrophilic parts face the water. The layers are fluid ; lipids constantly move. This movement is key to some cellular functions. Double bonds bw hydrocarbons of tail = kinks in tail. Unsaturated fats are more fluid because the kink in the tail prevents crystal- like structures to form. Functional type of proteins in cell membrane: channels, transporters, enzymes, receptors, structural proteins. Provide cells a way to send signals to e/o.
