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28 Cards in this Set
- Front
- Back
Protien components - channel proteins
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-Globular Proteins
-Some are always opened and some are gated -allow water and substances that dissolve in it to pass |
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Carrier Proteins
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-Transports substances across membrane
-closed until a molecule bonds to them, causing them to change shape. |
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Receptor Proteins
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Globular Proteins that are a receptor for chemical messengers
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Recognition Proteins
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-glycoprotein (protein+carbohydrate)
-marks cells as self |
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Enzymatic Proteins
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Globular proteins that act as catalysts
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Different types of proteins (5)
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1) Channel Proteins
2) Carrier Proteins 3) Receptor Proteins 4) Recognition Proteins 5)Enzymatic Proteins |
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Function of a membrane
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selective permiability, allows and prevents certain substances to cross, and aids certain ones.
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Diffusion
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Movement of a substance from a higher area of concentration to a lower area of concentration
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dynamic equalibrium
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fully difused no kinetic energy
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Osmosis
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Diffusion of water through a selectively permeable membrane
H2O moves through open channel proteins of membrane |
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Solvent
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Substance in which other substances are dissolved
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Solute
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Substance being dissolved
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Solution
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solvent + solute
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Hypertonic Solution
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Solution containing more solute than the solution to which it is compared
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hypotonic solution
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solution containing less solute than the solution to which it is compared
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Isotonic Solution
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Solution containing the same amount as the solution it is compared
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Turgor
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Swelling of the cell due to intake of H2O
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plasmolysis
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shrinkage of a cell due to a loss of H2O
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Inhibition
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swelling of substance due to adhesion of molecules
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Facilitated Transport
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Movement of a substance from an area of higher concentration to an area of lower concentration using a carrier protein
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Active Transport
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Movement of a substance from an area of higher concentration to an area of lower concentration using a carrier protein with energy from ATP
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Exocytosis
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Movement out of a cell by fusion of a vesicle with the cell membrane (requires ATP)
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Endocytosis
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Movement of a substance into a cell by formation of a vesicle (requires ATP)
Phagocytosis - solid Pinocytosis - liquid |
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Receptor
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mediate endocytosis - a form of pinocytosis using receptor proteins to bind the molecules being taken in.
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Cell Wall Structure (3 layers)
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1) Primary Cell Wall
2) Middle Lamella 3) Secondary Cell Wall |
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Primary Cell Wall
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-located outside of cell membrane
-mostly cellulose |
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Middle Lamella
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-area between two adjacent cells
-mostly pectins(polysaccharides) |
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Plasmodesmata (in plant cells)
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Channels through cell walls containing cytoplasmic strands and lined with plasma membrane
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