ANP 1105 Lecture Notes - Lecture 1: Cell Junction, Lipid Bilayer, Tight Junction

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: John Copeland

Document Summary

So(cid:373)e (cid:272)ells (cid:862)free(cid:863) (cid:894)e. g. (cid:271)lood (cid:272)ells, sper(cid:373) (cid:272)ells(cid:895) Like a velcro, want to simple the cells, want to have tight junctions. Allows gasses to pass through, messengers to pass through,, Lipid bilayer and proteins constantly changing fluid mosaic (fluid masiac madel) Lipids with polar sugar groups on outer membrane surface. Firmly inserted into membrane (trans-membrane- have hydrophobic and hydrophilic regions. Can interact with lipid tails and water. Function as transport proteins )channels and carriers_ enzymes or receptors. Include filaments an intracellular surface for membrane support. Functions as enzymes mator proteins for shape change during cell division and muscle contraction cell to cell connections. (cid:894)do(cid:374)"t go through the (cid:373)e(cid:373)(cid:271)ra(cid:374)e, fu(cid:374)(cid:272)tio(cid:374) pri(cid:373)arily as e(cid:374)zy(cid:373)e or a (cid:373)otor protei(cid:374), allows the membrane to contract) Functions of membrane proteins: transport. (targets a cell, a receptor is a protein, receptors for signal transduction, attachment for cytoskeleton and extraceular matrix, enzymatic activity.