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