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CELL BIO
KSU Module 2 Ch 7
25
Biology
Undergraduate 4
02/05/2018

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Term
Membranes define the _______ of a cell and its ______ compartments
Definition
Membranes define the BOUNDARIES of a cell and its INTERNAL compartments
Term
Membranes define ______ and serve as _________ barriers
Definition
Membranes define BOUNDARIES and serve as PERMEABILITY barriers
Term
Membranes are effective permeability layers because their interiors are ________.
Definition
Membranes are effective permeability layers because their interiors are HYDROPHOBIC.
Term
The __________ surrounds the whole cell.
Definition
PLASMA MEMBRANES
Term
_________ membranes compartmentalize functions within the cell
Definition
INTRACELLULAR
Term
Membranes are sites of specific ___________ and therefore are sites of specific functions
Definition
PROTEINS
Term
The specific _______ associated with particular membranes can be used to characterize the membrane.
Definition
ENZYMES
Term
Membrane proteins regulate the transport of _______.
Definition
SOLUTES
Term
Membrane proteins carry out and regulate the ______ of substances across the membrane.
Definition
TRANSPORT
Term
Some substances diffuse directly across membranes, whereas others must be moved by specific _________.
Definition
TRANSPORTERS
Term
Membrane proteins detect and transmit ______ and ______ signals.
Definition
ELECTRICAL and CHEMICAL
Term
A cell receives information from its environment as electrical or chemical signals at its ________.
Definition
SURFACE
Term
Signal transduction is the mechanisms by which signals are transmitted from the _______ surface to the ______ of a cell
Definition
SIGNAL TRANSDUCTION = signals transmission from OUTER surface to INTERIOR of a cell.
Term
________ are components of all membrane lipids except the sterols.
Definition
FATTY ACIDS
Term
Membrane proteins mediate cell _____ and cell-to-cell _________
Definition
ADHESION and COMMUNICATION
Term
Cell-to-cell contacts, critical in animal development, are often mediate by _______
Definition
CADHERINS
Term
CADHERINS have extracellular sequences of _________ that bind _______ and promote adhesion between similar types of cells in a tissue
Definition
have extracellular sequences of AMINO ACIDS that bind CALCIUM and promote adhesion
Term
______ JUNCTIONS hold cells together
Definition
ADHESIVE JUNCTIONS
Term
_____ JUNCTIONS form seals that block the passage of fluids b/t cells
Definition
TIGHT JUNCTIONS
Term
____ JUNCTIONS allow for communication b/t adjacent animal cells
Definition
GAP JUNCTIONS
Term
_______ act as gap junctions in plant cells
Definition
PLASMODESMATA = gap junctions that allow communication in plant cells
Term
The lowest PROTEIN/LIPID ratio (0.23) is what membrane?
Definition
MYELIN SHEATH OF A NERVE AXON
Term
The highest PROTEIN/LIPID ratio is which membrane?
Definition
MITOCHONDRIAL INNER MEMBRANE
Term
Membrane ______ are the "fluid" part of the fluid mosaic model
Definition
LIPIDS
Term
What are the most abundant lipids in membranes?
Definition
PHOSPHOLIPIDS
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