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29 Cards in this Set

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