PCB 3703C Lecture Notes - Lecture 2: Ldl Receptor, Membrane Lipids, Integral Membrane Protein
18 Oct 2017
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Document Summary
Lipid bilayers which is formed of phospholipids. Function: protects the cell from external trauma. Function : contains some channels for ions (ex: sodium, potassium) and substances. Function: contains 2 types of proteins > integral proteins and peripheral proteins which act as receptors for endocrine hormones (endocrine hormone cannot show its physiologic reaction on target cell without receptors) De ciency of integral protein may cause endocrine hormone disorder such as type 2 diabetes. Peripheral protein support the cytoplasmic side of the membrane by a network of laments > separate cell membrane from nucleus. Function: cell to cell binding, supporting cell. Has important role for transporting of molecules, ions, and substances. Passive: makes moving of ions, substances from higher concentration to lower concentration (high to low concentration without consuming atp) Active: ions or molecules move either from high or low concentration to other side which. Requires atp (important for ion pump through cell membrane such as sodium potassium pump)
