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Chapter 3

Cellular Transport Mechanisms- The Cell Membrane

QuestionAnswer
Phosphate heads are attracted to water therefore it is ______ hydrophilic
fatty acid tails are repelled by water therefore it is ______ hydrophobic
phospholipids are arranged as a _____ bilayer
hydrophilic heads are ____ polar
hydrophobic tails are ______ non polar
serves as a cellular barrier/border composed of phosphate head and fatty acid tails phospholipid bilayer
separates living cell from aqueous environment, controls traffic in and out of the cell cell membrane
membrane becomes semi-permeable via _____, these are channels that allow specific material across cell membrane protein channels
a type of integral membrane protein that spans the entirety of the cell membrane, function as gateways to permit the transport of specific substances across the membrane. transmembrane proteins
loosely bound to surface of membrane; act as receptors for hormones, recognition centers, and antigens; cell surface identity marker (antigens) peripheral proteins
penetrate lipid bilayer, usually across whole membrane, like tunnels or channels for the passage of water and/or other substances integral proteins
they proposed that membrane proteins are inserted into the phospholipid bilayer; fluid mosaic model S.J. Singer & G. Nicolson
is a collage of proteins & other molecules embedded in the fluid matrix of the lipid bilayer Membrane
play a key role in cell-cell recognition membrane carbohydrates
ability of a cell to distinguish one cell from another, important in organ & tissue development, basis for rejection of foreign cells by immune system cell-cell recognition
Created by: yuniskie
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