PHYL 2041 Lecture Notes - Lecture 1: Facilitated Diffusion, Signal Transduction, Membrane Transport Protein
19 Sep 2018
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Phyl 2041 lecture 1 - september 4, 2018 membrane transport: biological membranes: structure and function. Lipid: phospholipids, cholesterol, glycolipids: proteins: integral, gpi-anchored or peripheral, components free to diffuse: fluid mosaic model. Functions of the plasma membrane: tissue organization, such as temporary and permanent cell junctions, and interaction with the extracellular matrix, with the use of a variety of cell adhesion molecules. Determination of cell shape by linkage of the cytoskeleton to the plasma membrane: cell communication through neurotransmitter and hormone receptors and through signal transduction pathways, maintenance of cellular homeostasis: Selective transport of molecules into and out of the cell. A function carried out by membrane transport proteins. Movement across biological membranes classification: unassisted: gases such as o2, co2 (simple diffusion) Solute and water can be brought into the cell through a process of endocytosis and released from the cell through the process of exocytosis.
