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29 Cards in this Set
- Front
- Back
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A design where proteins "float" in a lipid bilayer
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fluid mosaic model
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What are the properties of the "head" of the lipid
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Contains phosphorus, electrically charged, hydrophilic
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What are the properties of the "tail" of a lipid.
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Long, nonpolar, fatty acid, hydrophobic
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What kind of macromolecule is cholesterol.
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lipid
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How do hibernating animals change their membranes?
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They replace saturated fats with unsaturated fats
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Proteins imbedded in the bilayer
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integral membrane proteins
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Proteins without hydrophobic regions
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Peripheral membrane proteins
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Proteins that potrude on both sides of the membrane.
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transmembrane proteins
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What are two ways that the proteins in a membrane can be restricted?
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cytoskeleton and lipid rafts
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What is the funciton of carbohydrates on the membrane?
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recognition site for other celss and molecules
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What two processes allow cells to arrange themselves in groups?
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cell recognition and cell adhesion
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The binding of cells in a tissue, the same kinds of molecules sticking out of the cells bind to eachother
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homotypic
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Binding between cells with different types of proteins.
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heterotypic
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When cells contribute material to additional membrane structures that help cement them together.
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cell junctions
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Junctions thatseal tissues and prevent leaks.
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Tight junctions
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What are three types of specialized cell junctions?
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tight, desmosomes and gap
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Hold adjacent cells firmly together.
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desmosomes
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Facilitate communication between cells.
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gap junctions
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What is the difference between active and passive transport
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active transportation involves the input of chemical energy
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Channels that allow water into a cell rapidly.
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aquaporins
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Facilitate diffusion by transporting polar molecules
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carrier proteins
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Transporter protein that moves a single solute in one direction.
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uniport
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Transporter protein that moves two solutes in one direction.
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symport
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Transporter protein that moves two solutes in opposite directions.
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anitport
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When a vesicle pinches off the plasma membrane and enters the cell
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endocytosis
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When vsicles fuse with the plasma membrane and release their contents.
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exocytosis
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What are the three kinds of endocytosis?
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phagocytosis, pinocytosis, and receptor-mediated endocytosis
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Cellular eating
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phagocytosis
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cellular drinking
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pinocytosis
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