BIOLOGY 1A03 Lecture Notes - Lecture 1: Respiratory Tract, Lipid Bilayer, Bacteroides
17 Jan 2018
School
Department
Course
Professor
9
BIOLOGY 1A03 Full Course Notes
Verified Note
9 documents
Document Summary
Theme one module one: typically 16 or 18 carbons in a single chain, the bonds connecting may be single bonds (saturated) or double bonds (unsaturated, these properties change the shape, size, and behaviour of the phospholipids. Organization of cell membranes: phospholipids spontaneously adopt membrane structures, water molecules interact with the head, but not the tails of phospholipids. Lipids aggregates form spontaneously, without the use of any energy. Theme one module one: cell membranes are selectively permeable, control traffic of substances into and out of the cell + organelle, proteins embedded in phospholipid bilayer facilitates transport across membrane. Fluid mosaic model: membranes consist of proteins & carbohydrates within a fluid phospholipid bilayer. Solute molecule touches and crosses lipid portion of plasma membrane into cell: movement along gradient (high to low, no energy. Facilitated diffusion: requires protein molecules (help to assist in transmembrane movement of solute, movement along gradient, no energy. Theme one module one: osmosis, transport of water across membranes, aquaporins:
